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A player page shows one box score, because a hitter and a pitcher share almost no column — which half you get follows the one he appears in. Every rate is built from summed counts, so a batting average is hits over at bats across whatever window you picked rather than an average of nightly averages. Pitchers rank against starters or relievers, which is the split the sport itself draws. A dash means no number for that cell, or a zero in a roster column that counts.

DET

Kenley Jansen

In losses, Kenley Jansen is 257th of 287 relief pitchers, at 6.

94th beats 94% of the Relief Pitchers; 1 is the best of however many the row says. Higher is always better, whichever way the stat runs. Red to green by where the placing sits. A stat with no better end is left unpainted.

all 4 shown▶
Playing TimeDefensevs Relief Pitchers▶
Games Pitched51
Games Started0
Innings Pitched43.142nd167/287
Batters Faced18034th191/287
Pitches Thrown72537th180/287
ResultsDefensevs Relief Pitchers▶
Wins467th78/287
Losses69th257/287
Earned Runs1674th66/287
Earned Run Average3.3272nd71/248
Runs Allowed1875th69/287
Hits Allowed2492nd22/287
Hits per 95.098th6/248
Walks and Hits per Inning1.0888th30/248
Home Runs Allowed732nd179/287
Home Runs per 91.523rd190/248
Strikeouts5151st140/287
Strikeout Rate28.3%82nd41/228
Strikeouts per 910.669th77/248
CommandDefensevs Relief Pitchers▶
Walks Allowed2339th168/287
Walk Rate12.8%11th203/228
Strikeout to Walk Ratio2.2239th140/228
Walks per 94.826th183/248
Intentional Walks143rd123/287
Hit Batters176th40/287
Wild Pitches164th65/287
Balks17th250/287
Strike Rate64.8%60th91/224
ReliefDefensevs Relief Pitchers▶
Saves2294th17/287
Save Opportunities28
Blown Saves65th266/287
Holds113th239/287
Games Finished39
Inherited Runners12
Inherited Runners Scored5
Inherited Runners Scored Rate41.7%—
51 games
DateOppIPWLSVHHRKBBERAWHIP
DETSep 25, 2026PITPIT100100200.000.00
DETSep 23, 2026WSHWSH100000000.000.00
DETSep 18, 2026@CWSCWS100100100.000.00
DETSep 14, 2026@TORTOR100100110.001.00
DETSep 12, 2026COLCOL100000200.000.00
DETSep 11, 2026COLCOL0.100100100.000.00
DETSep 7, 2026MINMIN100100010.001.00
DETSep 6, 2026@CLECLE100000000.000.00
DETSep 4, 2026@CLECLE1.201010200.000.60
DETSep 2, 2026@MINMIN0.100010110.006.00
DETAug 29, 2026LADLAD0.110000000.000.00
DETAug 25, 2026TBTB100100100.000.00
DETAug 19, 2026@PITPIT0.2010221027.003.00
DETAug 17, 2026@PITPIT100100200.000.00
DETAug 13, 2026CLECLE100100000.000.00
DETAug 11, 2026CLECLE00011002——
DETAug 9, 2026@SFSF110000300.000.00
DETAug 1, 2026@ATHATH100120209.002.00
DETJuly 29, 2026BALBAL100000110.001.00
DETJuly 24, 2026KCKC100100100.000.00
DETJuly 22, 2026@CHCCHC100000110.001.00
DETJuly 20, 2026@CHCCHC110010220.003.00
DETJuly 19, 2026@LAALAA100000210.001.00
DETJuly 11, 2026PHIPHI100010100.001.00
DETJuly 9, 2026ATHATH100110110.002.00
DETJuly 5, 2026@TEXTEX100100000.000.00
DETJuly 2, 2026@TEXTEX0.100000010.003.00
DETJune 28, 2026HOUHOU1.1010211120.252.25
DETJune 25, 2026HOUHOU100020009.002.00
DETJune 23, 2026NYYNYY00000000——
DETJune 20, 2026CWSCWS100110010.002.00
DETJune 19, 2026CWSCWS100100100.000.00
DETJune 13, 2026@CLECLE100000200.000.00
DETMay 27, 2026LAALAA0.200000010.001.50
DETMay 24, 2026@BALBAL0.2010110240.504.50
DETMay 20, 2026CLECLE100000110.001.00
DETMay 16, 2026TORTOR100000100.000.00
DETMay 15, 2026TORTOR0.210000200.000.00
DETMay 13, 2026@NYMNYM100000300.000.00
DETMay 10, 2026@KCKC100100200.000.00
DETMay 4, 2026BOSBOS100000110.001.00
DETApril 29, 2026@ATLATL00101101——
DETApril 24, 2026@CINCIN0.2010211027.003.00
DETApril 22, 2026MILMIL100110120.003.00
DETApril 18, 2026@BOSBOS100110000.001.00
DETApril 15, 2026KCKC100110100.001.00
DETApril 14, 2026KCKC100110000.001.00
DETApril 10, 2026MIAMIA100100100.000.00
DETApril 4, 2026STLSTL0.100000110.003.00
DETMarch 31, 2026@ARIARI0.1000111027.003.00
DETMarch 27, 2026@SDSD100100300.000.00
By season3 seasons
SeasonGGSIPWLSVERAWHIPHHRKBB
2026DET51043.146223.321.082475123
2025LAA6205954292.590.953785719
2024BOS54054.242273.291.063846220

About MLB Research

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Every number the site holds for a Major League team and the players who played for it, in one place. Pick a club, a season and a set of games, and read it. Nothing here needs an account.

Where the numbers come from

The same tables the boards read, resolved through one shared definition per stat. A rate is computed over the whole window rather than averaged across games, so a season figure is not the mean of the nightly ones.