← BackMartín Pérez
CWS · LHP · 2025
51.7 IP · 230 BF · 902 pitches · 2025 season
HIGH Descriptive — not a forecast
93
Stuff+
11th percentile
93
ABStuff+
2th percentile
90
Pitching+
4th percentile
19.1%
K%
35th percentile
9.6%
BB%
40th percentile
4.79
FIP
48th percentile
Grades describe this season's stuff and run prevention. They are not forecasts: on clean season pairs the model has not beaten naive persistence (RESULTS-MLB §13), so nothing here projects next season.
Percentile rankings
vs 2025 graded MLB pitchers · 51.7 IP · 230 BF · 902 pitches · 2025 season
Stuff
Stuff+93
11th percentile
ABStuff+93
2th percentile
Whiff%18.1%
20th percentile
CSW%32.9%
41th percentile
Results
Pitching+90
4th percentile
RV/100+0.69
77th percentile
FIP4.79
48th percentile
RA/92.96
78th percentile
GB%38.8%
40th percentile
Command
K%19.1%
35th percentile
BB%9.6%
40th percentile
K-BB%9.6%
33th percentile
Velo85.4
5th percentile
How to read these
Each row is his rank, 1 to 99, among all graded MLB pitchers this season; the tick is the median. Green is good for him, red bad, whatever the stat's direction (a low FIP ranks high). Grey circles are descriptive rates with no good direction, and n= in place of a rank means too few events to rank. Grades are descriptive, not forecasts.
Percentile rankings
Raw plate discipline · vs 2025 graded MLB pitchers · 51.7 IP · 230 BF · 902 pitches · 2025 season
Swing & miss
Z-Whf%13.8%
42th percentile
O-Whf%28.3%
5th percentile
Chase%24.9%
26th percentile
Z-Con%86.2%
42th percentile
O-Con%71.7%
10th percentile
SwStr%26.3%
41th percentile
PutAwy%16.8%
46th percentile
Approach
Zone%49.7%
43th percentile
Z-Swg%60.0%
5th percentile, descriptive, no good or bad direction
Swing%42.4%
5th percentile
CS%23.3%
84th percentile
F-Str%55.7%
89th percentile
How to read these
Raw rates with this season's descriptive ranks. Sample-adjusted (shrunk) rankings are not shown yet: the reliability constants behind them were measured on college data and are being re-measured on MLB. Until then a small sample here is a small sample — hover the leaderboard column for its event count.
ArsenalKey columns; every column is on the Arsenal tab
Movement Profile
SI0.0/-1.2CH+3.2/-0.3CT+0.7/-0.8CB+5.4/-5.0FF+0.3/-2.1ring = slot expectation ±1σ/2σ · HB mirrored for LHP · descriptive
Release Traits
Height: 5.68 ft (±0.17)
Side: 1.12 ft (±0.17)
Extension: 6.04 ft
Season means; the ± is the SD across his pitches. Per-pitch release plots land in a later wave.
Batted Ball Against
Pitch
N_BIP
GB%
FB%
LD%
PU%
Avg EV
Avg LA
HrdHit%
SI
59
35.6
33.9
18.6
0.0
83.8
16.1
35.6
CH
48
47.9
29.2
16.7
0.0
81.6
9.8
37.5
CT
38
21.1
36.8
26.3
0.0
83.9
30.8
44.7
CB
11
63.6
18.2
18.2
0.0
84.2
1.0
36.4
FF
4
75.0
25.0
0.0
0.0
82.1
24.4
75.0
Every pitch type he threw, ordered by balls in play. Rows under 5 BIP are dimmed rather than dropped — a slider put in play twice is a fact about the slider.
Arsenal
Pitches
5
60th pct
Effective mix
4.1
69th pct
Separation
16.9
18th pct
Shape scatter
3.0 in
41st pct
Velo range
13.3 mph
66th pct
SI · CH · CT · CB · FF
2025 season, 902 pitches; percentiles vs MLB pitchers with 100+ that season. A description of the arsenal, not a grade: none of these predicted next season beyond Pitching+ and his own prior year. For shape scatter a higher percentile is MORE scatter.
Location value
runs per 100 pitches vs league
Total
+0.06
68th percentile
Where he throws
+0.03
60th percentile
Which pitch there
+0.03
65th percentile
Heart29.4%
+148.26/100
Shadow41.6%
+125.76/100
Chase23.4%
−278.14/100
Waste5.7%
−488.14/100
What makes up the total
shadow · CH13.2%+0.28
chase · SI6.4%−0.27
heart · SI11.1%+0.23
chase · CT5.8%−0.21
shadow · SI12.7%+0.15
15 other locations−0.13
Total+0.06
Pitcher-positive, centred on the 2025 league mean (+0.01 RV/100). Ranks are descriptive: the year-to-year reliability of this mix on MLB has not been measured yet, so no cell is verdict-coloured. His actual run value minus this mix — execution — is deliberately not shown.