Mithrandir Metrics
Player ATL Refreshed Sep 28 06:00 AM ET
Player profile / ATL

Mike Yastrzemski

Player · Bats/Throws L/L · 5' 10", 180 lb · Age 36

Cards
23
Modules
2
Live Δ
yes
Club ATL Position -- Roster profile Status Healthy / active roster
Traditional line

Season by season

PARHHRSBAVGOBPSLGOPS
20244746099183.231.302.437.739
202555868111177.233.333.403.736
20264085181121.224.309.380.689
8 Seasons354748473513526.236.322.440.762
At a glance

Season percentile report

The headline weighs outcome stats (xwOBA, barrels); each bar averages its full strip group below. 100 = best in MLB.

2026-09-28
60
Offense
percentile
Offense9 metrics
57
Defense4 metrics
45
Speed2 metrics
51
Plate skills10 metrics
57
Rolling projection

Preseason / current pace / Bayesian update

Rolling bands shrink current-season signal toward the preseason prior until the sample earns more weight.

2026-09-28
xwOBA preseason0.319
xwOBA current pace0.309
xwOBA rolling p500.312
Observed weight66%
xwOBA
0.290 0.301 0.312 0.324 0.334
wOBA
0.300 0.314 0.330 0.345 0.359
ISO
0.147 0.158 0.171 0.184 0.196
K%
21.4% 22.7% 24.1% 25.5% 26.7%
Live percentile strip

Current traits vs projection tick

100th = best in MLB.

2026-09-28
Hitting · percentile strip
Barrel%4.5%
45 -18 vs proj
Exit velocity89.8
74
Hard-hit%43.2%
74
xBA0.323
56
xSLG0.505
52
xwOBA0.309
56
BB%10.0%
68
Bat speed69.2
44
K%24.3%
42
Defense · percentile strip
Arm Runs1.7 · LF
86
Arm Strength92.5 · LF
41
Outs Above Avg-1.0 · LF
25
Range Runs-2.1 · LF
26
Baserunning · percentile strip
Base Running Runs0.9 · LF
61
Sprint Speed27.1 · LF
41
Mithrandir+

Plate skills: swing decisions and pitch-type resistance

Our research metrics for how this hitter controls the strike zone and handles each pitch family.

2026-09-28
Avoids Bad ChasesST 68.4% · rebadged research
65
Avoids Bad TakesHPT 28.5% · rebadged research
21
Correct Decisions65.4% · rebadged research
41
SEAGER+ Plate Discipline100
48
Resists Breaking - horizontalwOBA 0.262 · borderline
92
Resists Breaking - verticalwOBA 0.310 · insufficient sample
5
Resists ChangeupwOBA 0.271 · validated thin sample
76
Resists Cutters + splitterswOBA 0.302 · insufficient sample
92
Resists FastballwOBA 0.326 · validated
75
Resists SinkerwOBA 0.353 · validated
60
Rolling form chart

xwOBA snapshot line

Live snapshot series; true 50/100 PA windows require PA-level logs

12 snapshots
Mithrandir Metrics ROLLING XWOBA LINE Parameterized Mithrandir chart rendered as SVG for templates and exports. season=2026 Rolling xwOBA Yastrzemski, Mike · Live snapshot series; true 50/100 PA windows require PA-level logs LG AVG 0.302 0.309 2026-09-14: 0.3072026-09-18: 0.3092026-09-19: 0.3072026-09-20: 0.3072026-09-21: 0.3102026-09-22: 0.3102026-09-23: 0.3112026-09-24: 0.3102026-09-25: 0.3102026-09-26: 0.3092026-09-27: 0.3092026-09-28: 0.309 2026-09-14 2026-09-28 xwOBA MITHRANDIR · CHARTS
Spray profile

Field-coordinate spray profile

187 Statcast batted-ball coordinates from the pitch-event feed (2026). Direction profile remains as the v1 context layer when coordinate density is limited.

Mithrandir Metrics SPRAY CHART Parameterized Mithrandir chart rendered as SVG for templates and exports. season=2026 Spray Chart Yastrzemski, Mike · Statcast batted-ball landing coordinates Left field third: 11% of plotted batted ballsPull 11%Center field third: 70% of plotted batted ballsCenter 70%Right field third: 19% of plotted batted ballsOppo 19% LF 335 CF 400 RF 325 2026-03-16 · double · CH · fly_ball · EV 78.1 / LA 54.02026-03-16 · field out · CH · line_drive · EV 93.5 / LA 18.02026-03-16 · double · SI · fly_ball · EV 96.3 / LA 31.02026-03-23 · home run · FF · fly_ball · EV 95.1 / LA 28.02026-03-23 · field out · CH · popup · EV 64.5 / LA 65.02026-03-24 · home run · CH · fly_ball · EV 102.6 / LA 24.02026-03-28 · single · FC · ground_ball · EV 45.1 / LA -68.02026-03-28 · single · CH · line_drive · EV 96.6 / LA 10.02026-03-28 · force out · SL · ground_ball · EV 80.4 / LA -8.02026-03-28 · field out · FF · line_drive · EV 102.5 / LA 18.02026-03-29 · single · CH · ground_ball · EV 100.5 / LA -7.02026-03-29 · double · CU · line_drive · EV 76.8 / LA 18.02026-03-29 · field out · SI · popup · EV 72.6 / LA 70.02026-03-30 · triple · FF · line_drive · EV 104.5 / LA 20.02026-03-30 · field out · ST · fly_ball · EV 86.8 / LA 44.02026-03-31 · field out · CU · fly_ball · EV 94.3 / LA 27.02026-03-31 · field out · CU · fly_ball · EV 84.2 / LA 34.02026-03-31 · field out · CU · ground_ball · EV 84.0 / LA -29.02026-04-01 · field out · FF · fly_ball · EV 93.5 / LA 48.02026-04-01 · field out · SI · popup · EV 85.6 / LA 69.02026-04-02 · double · EP · fly_ball · EV 94.0 / LA 17.02026-04-02 · field out · FS · ground_ball · EV 76.3 / LA -3.02026-04-02 · field out · CU · ground_ball · EV 94.1 / LA -18.02026-04-02 · field out · FF · ground_ball · EV 102.2 / LA -9.02026-04-04 · field out · CH · ground_ball · EV 36.8 / LA -87.02026-04-05 · single · CH · ground_ball · EV 97.1 / LA -4.02026-04-05 · grounded into double play · FC · ground_ball · EV 96.0 / LA -1.02026-04-05 · field out · SI · fly_ball · EV 91.8 / LA 32.02026-04-06 · field out · FF · fly_ball · EV 88.0 / LA 39.02026-04-06 · field out · FF · fly_ball · EV 97.0 / LA 32.02026-04-06 · field out · SI · ground_ball · EV 103.6 / LA -1.02026-04-06 · single · SI · ground_ball · EV 100.0 / LA 2.02026-04-07 · field out · CH · ground_ball · EV 68.6 / LA -6.02026-04-08 · field out · SI · ground_ball · EV 91.8 / LA -11.02026-04-08 · field out · SL · fly_ball · EV 84.5 / LA 47.02026-04-10 · field out · FF · ground_ball · EV 64.5 / LA -36.02026-04-10 · field out · FC · ground_ball · EV 97.2 / LA -5.02026-04-11 · field out · SL · line_drive · EV 93.6 / LA 20.02026-04-11 · field out · FF · ground_ball · EV 92.5 / LA -27.02026-04-12 · single · FF · ground_ball · EV 102.3 / LA 5.02026-04-13 · field out · FF · fly_ball · EV 94.4 / LA 42.02026-04-13 · single · CU · ground_ball · EV 101.5 / LA 5.02026-04-14 · field out · SL · ground_ball · EV 82.5 / LA 0.02026-04-14 · field out · SI · ground_ball · EV 95.1 / LA -7.02026-04-14 · single · FF · line_drive · EV 105.0 / LA 11.02026-04-15 · field out · ST · ground_ball · EV 105.1 / LA 2.02026-04-15 · single · FF · fly_ball · EV 74.0 / LA 28.02026-04-15 · field out · FF · line_drive · EV 98.7 / LA 20.02026-04-17 · single · SI · ground_ball · EV 98.1 / LA -5.02026-04-17 · field out · SL · fly_ball · EV 96.4 / LA 40.02026-04-19 · field out · SL · line_drive · EV 103.4 / LA 21.02026-04-19 · double · SL · line_drive · EV 86.2 / LA 18.02026-04-20 · field error · FF · ground_ball · EV 99.4 / LA -10.02026-04-20 · field out · SL · line_drive · EV 95.7 / LA 22.02026-04-20 · fielders choice · FF · ground_ball · EV 98.2 / LA -2.02026-04-22 · field out · FF · ground_ball · EV 101.5 / LA -1.02026-04-22 · field out · SI · ground_ball · EV 91.0 / LA 6.02026-04-22 · field out · FS · fly_ball · EV 89.0 / LA 27.02026-04-22 · single · FF · line_drive · EV 104.5 / LA 16.02026-04-23 · field out · FF · ground_ball · EV 91.3 / LA -8.02026-04-24 · field out · FF · ground_ball · EV 82.0 / LA 5.02026-04-24 · field out · FF · fly_ball · EV 92.9 / LA 33.02026-04-24 · field out · FF · fly_ball · EV 81.1 / LA 46.02026-04-24 · single · SI · ground_ball · EV 99.5 / LA 1.02026-04-25 · field out · FF · ground_ball · EV 62.3 / LA -21.02026-04-25 · field out · SL · fly_ball · EV 93.9 / LA 29.02026-04-28 · single · FC · line_drive · EV 78.6 / LA 16.02026-04-28 · double · FF · line_drive · EV 89.7 / LA 15.02026-04-28 · field out · ST · ground_ball · EV 72.7 / LA -2.02026-04-29 · field out · FF · fly_ball · EV 86.7 / LA 47.02026-04-30 · field out · CU · ground_ball · EV 94.2 / LA -8.02026-04-30 · single · FF · line_drive · EV 93.7 / LA 10.02026-05-01 · field out · SL · ground_ball · EV 73.4 / LA -5.02026-05-02 · field out · FF · popup · EV 75.4 / LA 73.02026-05-02 · field out · SI · line_drive · EV 91.0 / LA 24.02026-05-02 · field out · SL · ground_ball · EV 100.8 / LA 5.02026-05-03 · single · FF · fly_ball · EV 64.7 / LA 31.02026-05-03 · field out · CH · ground_ball · EV 81.1 / LA -11.02026-05-03 · field out · ST · popup · EV 80.5 / LA 77.02026-05-04 · single · FC · line_drive · EV 104.9 / LA 14.02026-05-04 · field out · FS · ground_ball · EV 94.0 / LA -1.02026-05-04 · field out · CH · ground_ball · EV 69.7 / LA -10.02026-05-04 · field out · FS · popup · EV 92.6 / LA 67.02026-05-05 · field out · FC · fly_ball · EV 73.1 / LA 32.02026-05-05 · single · FF · ground_ball · EV 103.8 / LA 8.02026-05-06 · field out · FF · popup · EV 80.4 / LA 70.02026-05-06 · field out · FF · popup · EV 86.4 / LA 71.02026-05-06 · single · SI · line_drive · EV 106.2 / LA 15.02026-05-08 · field out · CH · ground_ball · EV 93.9 / LA -2.02026-05-08 · field out · FF · fly_ball · EV 99.5 / LA 32.02026-05-12 · home run · SL · fly_ball · EV 102.8 / LA 35.02026-05-12 · single · FF · line_drive · EV 91.5 / LA 15.02026-05-13 · double · ST · line_drive · EV 101.1 / LA 20.02026-05-14 · field out · FF · fly_ball · EV 93.2 / LA 37.02026-05-15 · double · FF · line_drive · EV 101.2 / LA 15.02026-05-17 · single · CH · ground_ball · EV 74.7 / LA 3.02026-05-17 · home run · CU · fly_ball · EV 94.6 / LA 39.02026-05-17 · field out · CH · fly_ball · EV 77.5 / LA 33.02026-05-18 · field out · FF · fly_ball · EV 93.5 / LA 43.02026-05-20 · field out · CH · fly_ball · EV 95.6 / LA 34.02026-05-20 · field out · SL · fly_ball · EV 88.1 / LA 43.02026-05-20 · field out · CU · ground_ball · EV 92.2 / LA -8.02026-05-20 · field out · SI · ground_ball · EV 77.5 / LA -5.02026-05-21 · double · FF · line_drive · EV 97.0 / LA 14.02026-05-21 · home run · CH · fly_ball · EV 102.4 / LA 23.02026-05-21 · single · SI · line_drive · EV 106.2 / LA 7.02026-05-23 · field out · FF · fly_ball · EV 91.3 / LA 52.02026-05-23 · field out · FF · fly_ball · EV 85.7 / LA 42.02026-05-26 · single · SI · line_drive · EV 97.9 / LA 10.02026-05-31 · single · FF · line_drive · EV 99.7 / LA 12.02026-06-04 · field out · CU · line_drive · EV 88.0 / LA 25.02026-06-04 · field out · FS · line_drive · EV 95.2 / LA 19.02026-06-05 · field out · SL · line_drive · EV 106.2 / LA 17.02026-06-05 · field out · FF · fly_ball · EV 87.9 / LA 52.02026-06-07 · field out · CH · fly_ball · EV 96.8 / LA 24.02026-06-07 · field out · FF · fly_ball · EV 88.3 / LA 57.02026-06-22 · field out · SI · line_drive · EV 104.9 / LA 18.02026-06-22 · single · CH · line_drive · EV 102.7 / LA 15.02026-06-22 · field out · CH · ground_ball · EV 48.6 / LA -67.02026-06-26 · field out · FF · ground_ball · EV 97.0 / LA -12.02026-06-26 · field out · SL · fly_ball · EV 83.8 / LA 33.02026-06-26 · field out · SI · ground_ball · EV 86.7 / LA -28.02026-06-26 · field out · CH · fly_ball · EV 91.8 / LA 26.02026-06-30 · single · ST · ground_ball · EV 44.5 / LA -6.02026-06-30 · field out · CH · ground_ball · EV 68.6 / LA -22.02026-07-01 · field out · CH · line_drive · EV 101.6 / LA 22.02026-08-02 · field out · FC · ground_ball · EV 84.1 / LA 7.02026-08-02 · home run · FF · fly_ball · EV 102.4 / LA 24.02026-08-02 · sac fly · FF · fly_ball · EV 97.4 / LA 31.02026-08-04 · field out · FF · ground_ball · EV 82.8 / LA -51.02026-08-05 · field out · FF · fly_ball · EV 97.7 / LA 30.02026-08-08 · field out · FF · line_drive · EV 93.7 / LA 16.02026-08-08 · double · SL · line_drive · EV 96.1 / LA 23.02026-08-11 · field out · SI · ground_ball · EV 82.4 / LA -14.02026-08-14 · field out · CH · line_drive · EV 94.7 / LA 11.02026-08-14 · field out · FF · ground_ball · EV 105.7 / LA 1.02026-08-16 · field out · FF · ground_ball · EV 88.9 / LA -27.02026-08-16 · field out · CH · ground_ball · EV 101.3 / LA 5.02026-08-16 · field out · FS · line_drive · EV 90.6 / LA 10.02026-08-17 · field out · FC · fly_ball · EV 94.9 / LA 26.02026-08-17 · field out · SL · ground_ball · EV 91.9 / LA -13.02026-08-17 · field out · ST · popup · EV 80.5 / LA 55.02026-08-19 · single · FS · ground_ball · EV 97.4 / LA -5.02026-08-21 · single · KC · ground_ball · EV 102.9 / LA 5.02026-08-21 · single · CU · line_drive · EV 90.5 / LA 14.02026-08-22 · field out · FC · fly_ball · EV 103.6 / LA 49.02026-08-22 · grounded into double play · FC · ground_ball · EV 101.1 / LA 1.02026-08-26 · single · FO · fly_ball · EV 71.9 / LA 35.02026-08-27 · double play · FF · line_drive · EV 87.0 / LA 5.02026-08-27 · field out · FS · ground_ball · EV 94.1 / LA 4.02026-08-29 · field out · FS · ground_ball · EV 66.9 / LA -61.02026-08-29 · field out · FF · ground_ball · EV 105.1 / LA -18.02026-08-29 · field out · SL · ground_ball · EV 87.1 / LA -20.02026-08-29 · grounded into double play · ST · ground_ball · EV 73.6 / LA -23.02026-08-31 · field out · SI · fly_ball · EV 85.1 / LA 41.02026-08-31 · field out · CH · fly_ball · EV 98.6 / LA 37.02026-08-31 · field out · FF · ground_ball · EV 97.0 / LA 5.02026-09-02 · grounded into double play · FA · ground_ball · EV 89.0 / LA 2.02026-09-02 · double · CU · line_drive · EV 81.6 / LA 24.02026-09-02 · field out · SL · fly_ball · EV 96.8 / LA 31.02026-09-02 · single · ST · ground_ball · EV 41.1 / LA -64.02026-09-06 · single · FF · fly_ball · EV 73.2 / LA 28.02026-09-08 · field out · FF · line_drive · EV 58.2 / LA 38.02026-09-08 · field out · FF · line_drive · EV 99.4 / LA 22.02026-09-08 · field out · CH · ground_ball · EV 81.3 / LA -34.02026-09-09 · field out · CH · line_drive · EV 104.8 / LA 19.02026-09-09 · field out · SI · fly_ball · EV 90.8 / LA 56.02026-09-09 · field out · CH · fly_ball · EV 82.4 / LA 39.02026-09-10 · double · SI · line_drive · EV 92.1 / LA 22.02026-09-11 · single · SL · ground_ball · EV 91.8 / LA -8.02026-09-11 · single · FF · fly_ball · EV 73.1 / LA 34.02026-09-11 · single · CH · line_drive · EV 96.6 / LA 10.02026-09-13 · field out · FF · ground_ball · EV 89.1 / LA 1.02026-09-13 · force out · ST · ground_ball · EV 60.3 / LA -50.02026-09-18 · field out · CH · line_drive · EV 94.8 / LA 6.02026-09-18 · field out · FF · ground_ball · EV 64.9 / LA -13.02026-09-20 · home run · FF · fly_ball · EV 101.4 / LA 36.02026-09-20 · field out · CH · line_drive · EV 97.4 / LA 8.02026-09-20 · single · FF · line_drive · EV 96.1 / LA 13.02026-09-23 · field out · CU · popup · EV 91.9 / LA 65.02026-09-25 · field out · SI · popup · EV 96.9 / LA 62.02026-09-26 · field out · ST · fly_ball · EV 78.1 / LA 37.02026-09-26 · field out · SL · popup · EV 63.4 / LA 34.02026-09-26 · field out · ST · popup · EV 91.1 / LA 60.02026-09-27 · field out · FF · fly_ball · EV 99.9 / LA 33.02026-09-27 · field out · SL · ground_ball · EV 98.9 / LA 4.02026-09-27 · field out · FF · fly_ball · EV 89.5 / LA 46.0 1B2B3BHROut Zone shading = batted-ball density by field third · hover dots for date, pitch, EV, and LA. MITHRANDIR · CHARTS
Zone profile

Aggregate zone heatmap

Aggregate zone metrics from seasonal Statcast leaderboards.

Mithrandir Metrics ZONE HEATMAP Parameterized Mithrandir chart rendered as SVG for templates and exports. season=2026 Swing Zone Profile Yastrzemski, Mike · Aggregate zone metrics; not pitch-by-pitch locations Zone: 49%49%Chase: 26%26%Whiff: 21%21%Zone contact: 86%86%Contact: 79%79%Hard hit: 43%43% Dashed border = aggregate mixed-batter zone proxy MITHRANDIR · CHARTS
Bat tracking

Swing path, attack angle, bat speed

Aggregate Savant bat-tracking metrics; not per-swing motion capture. The full swing, with the recommended path overlaid, lives in the 3D Swing Simulator.

Watch the swing in 3D →

2026
Mithrandir Metrics BAT SPEED DISTRIBUTION Parameterized Mithrandir chart rendered as SVG for templates and exports. Bat Speed Yastrzemski, Mike · aggregate bat speed marker 60 mph 85 mph Avg bat speed 70.5 mph Hard swing rate 4% Whiff / swing 24% MITHRANDIR · CHARTS
Reference layer

Current snapshot

MLB bio context is unavailable.
Live layer

Delta / regression

xwOBA Δ-0.009
wOBA Δ+0.012

negative regression

Regression watch

Running hot. Expect some cooling.

-0.8σ gap
wOBA (actual)0.330
xwOBA (deserved)0.309

Yastrzemski’s wOBA sits at 0.330, but the quality of contact underneath says it should be 0.309 — a gap of 0.021, -0.8 standard deviations from the MLB norm over 419 PA. The results have outrun the underlying process; as the sample grows, expect the numbers to drift back toward the deserved level.

Comp Engine · 2026 profile shape

Closest profiles

Full constellation →
PlayerSimilarityAgrees onOpen
O'Hearn, Ryan PIT · L 0.80 Bat speedIsolated power Player · Projection
Tucker, Kyle LAD · L 0.74 Barrel rateBat speed Player · Projection
Wells, Austin NYY · L 0.71 Hard-hit rateSweet-spot rate Player · Projection
Semien, Marcus NYM · R 0.70 Pull rateWhiff rate Player · Projection

Profile-shape similarity, not results: six weighted feature groups standardized within this season's qualified hitters.

Mithrandir coverage

Module shelf

ModuleCardsLatestSignal
Hitting52026-08-08Disciplined swing decisions drove the score
Fielding182026-09-264 chances | 0 difficult plays | Run Exp +2.485
Projection links / recent games

Available detail

Hitter Projections 20260.317 xwOBA | 19 HRProjection