BIGLEAGUE

Boston Red Sox · Pitcher · #63

Justin Slaten

Age 286' 4" · 222lbBats R · Throws RDebut 2024From Longview

ERA

4.60

W-L

2-4

K

39

WHIP

1.37

WAR

0.6

FIP

3.02

League Percentile

2026 season · percentile vs 54 qualified pitchers
the entire league54relief pitchers290
ERA
7
4.60
WHIP
13
1.37
Strikeouts
0
39
K/9
94
11.20
Wins
0
2
Bottom of leagueAverage (50)Top of league

⚠ Below the qualified innings threshold. Percentiles are for reference only.

the entire league · by ERA

Top 93%

Justin Slaten's ERA (4.60) ranks below average among 54 qualified pitchers. The number on each bar is a percentile (higher is better); use the tabs to change the comparison pool.

PITCHING

Season · Career
CategoryGamesERAWinsLossesSavesInningsStrikeoutsWalksWHIP
2026 Season364.6024031.13981.37
Career1163.7310105120.2122271.13

Hover over a stat for its definition.

ARSENAL

Pitch arsenal · 2026 usage and average velocity
Cutter41.5%avg 151 km/h
Four-Seam25.2%avg 155 km/h
Sweeper17.1%avg 138 km/h
Sinker12.8%avg 157 km/h
Curveball3.3%avg 136 km/h

ADVANCED

Advanced metrics · 2026 season

BABIP

.369

K/9

11.20

BB/9

2.30

HR/9

1.15

Quality starts

0

Whiff%

25.2%

GAME LOG

Last 10 games · includes team result
DateOppInningsHitsERWalksStrikeoutsTeam
08.12@ TOR1.00011L
08.08vs ATH0.21110L
08.06vs CWS1.03102W
08.02@ LAD0.10000W
08.01@ LAD1.00001W
07.29@ ATH1.01001W
07.27@ ATH0.20000W
07.26vs TOR1.00001W
07.22vs BAL1.11001W
07.17vs TB1.00001W

SPLITS

Situational splits (2026)

Home

Opp AVG.295
IP14.2
K17
WHIP1.36

Away

Opp AVG.258
IP16.2
K22
WHIP1.38

vs LHP

Opp AVG.265
IP17.0
K23
WHIP1.18

vs RHP

Opp AVG.288
IP14.1
K16
WHIP1.60

RISP

Opp AVG.270
IP9.1
K17
WHIP1.50

YEAR BY YEAR

Year-by-year · Career trends

ERALower is better

▲ Trending down year over year
ERA by yearFrom 2.93 in 2024 to 4.60 in 2026. Lower is better for this stat.2024 ERA: 2.932.9320242025 ERA: 4.2420252026 ERA: 4.604.602026
Show yearly figures
ERA year-by-year details
YearERA
20242.93
20254.24
20264.60

WHIPLower is better

▲ Trending down year over year
WHIP by yearFrom 1.01 in 2024 to 1.37 in 2026. Lower is better for this stat.2024 WHIP: 1.011.0120242025 WHIP: 1.0920252026 WHIP: 1.371.372026
Show yearly figures
WHIP year-by-year details
YearWHIP
20241.01
20251.09
20261.37

Strikeouts

▲ Trending up year over year
Strikeouts by yearFrom 58 in 2024 to 39 in 2026.2024 Strikeouts: 585820242025 Strikeouts: 252520252026 Strikeouts: 39392026
Show yearly figures
Strikeouts year-by-year details
YearStrikeouts
202458
202525
202639
YearTeamGamesERAWinsLossesSavesInningsStrikeoutsWalksWHIP
2024BOS442.9362255.15891.01
2025BOS364.2424334.025101.09
2026BOS364.6024031.13981.37