DataBaseball
2026
Kyle Seager headshot

3B · 2021

Kyle Seager

Age
34
B/T
L/R
Height
6' 0"
Weight
216 lb
Number
#15
Born
November 3, 1987 in Charlotte, NC, USA
MLB debut
July 7, 2011
dbWAR
17.4
7 season(s)
PA
670
AVG
.212
OBP
.285
SLG
.438
wRC+
99
100 = avg

Kyle Seager is a third baseman for the Seattle Mariners. In 2021 he hit 35 home runs and knocked in 101 RBIs, notching 128 hits across 670 plate appearances in 159 games. His batting average was .212, 12.9% lower than the league average of .244. He reached base at a .285 clip and slugged .438, for an OPS of .723, 0.7% lower than the league mark of .728 — 5th of 17 on his team, and 225th of 463 among MLB batters with 100+ plate appearances. He averaged 88.7 mph off the bat, hit 40.1% of balls in play at 95 mph or better, barrelled 11.4% of them and made contact on 70.3% of his swings. Adjusted for his ballpark and league, his 99 wRC+ puts his offence 1% below average. That comes to 1.9 dbWAR — -4.1 runs with the bat, -0.2 on the bases, +1.6 for the position he plays, against replacement level. It includes no fielding: defensive runs are proprietary and are not estimated here, so the figure credits playing a demanding position but not playing it well.

League context

Percentile among qualified batters, 2021.

wRC+99
wOBA.310
ISO.226
BB%8.8%
WAR1.9

How the WAR is built

Runs above replacement, 2021. These four terms sum to +19.6 runs, divided by runs-per-win to give WAR.

Batting-4.1Baserunning-0.2Position+1.6Replacement+22.3
BattingBaserunningPositionReplacement

WAR by season

5.02.50.015161718192021

Batting

Standard and advanced, by season.

Trend
202115967012835101359161.212.285.438.226.2268.8%24.0%.310-4.1991.9
2020602484994053233.241.355.433.192.24012.9%13.3%.341+4.01141.3
201910644394236324486.239.321.468.229.2489.9%19.4%.335+4.51101.9
20181556301292278238138.221.273.400.178.2516.0%21.9%.291-13.9850.9
20171546501442788258110.249.323.450.201.2628.9%16.9%.330+3.11072.6
20161586761663099369108.278.359.499.221.29510.2%16.0%.367+24.61335.0
2015161686166267465498.266.328.451.185.2787.9%14.3%.338+11.71193.8

Platoon splits

How he hits left- and right-handed pitching.

Batting by the hand the pitcher throws with, 2021. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
SplitPAABHHRBBSOAVGOBPSLGwOBAK%
vs LHP23421948131364.219.261.438.29627.4%
vs RHP43638480224697.208.298.438.31722.2%

Spray chart

Where every ball he put in play landed, 2021.

Loading 445 batted balls…

Contact quality

How hard and at what angle he hits it, over 446 tracked batted balls in 2021. Percentiles are against qualified batters.

Barrel rate
11.4%
51 barrels
Exit velocity
88.7
mph average
Max exit velo
111.0
mph, hardest hit
Hard hit
40.1%
95 mph or better
Sweet spot
37.2%
8–32° launch
Launch angle
19.0°
average
Barrel rate11.4%
Exit velocity88.7 mph
Hard hit rate40.1%
Contact rate70.3%

A barrel is a batted ball whose exit velocity and launch angle have historically produced at least a .500 average and 1.500 slugging — 98 mph within 26–30°, widening to 8–50° by 116 mph. Reconstructed from Statcast's published anchor points, which reproduces them exactly; the interior is within a degree. Sweet spot (8–32°) is an exact definition.

Hot and cold zones

Batting average by pitch location, 2021.

.231.214.112.065.00023 AB.20030 AB.35020 AB.26967 AB.34182 AB.32331 AB.07864 AB.29671 AB.31332 AB
Below averageLeague averageAbove average
Batting average by location of the pitch that ended each plate appearance, catcher's view. The bordered square is the strike zone; the outer band is chase territory. Cells with fewer than 8 at-bats are left grey rather than shown as signal. League average on the same attribution is .243.

Situational hitting

How Kyle Seager hits by base state, outs, score and late-game pressure — each read against his own season line.

Split by
By who is on base when he comes up. The season line is repeated as the baseline.
SituationPAABHHRRBIBBSOAVGOBPSLGwOBA
All situations670.212.285.438.310
Bases empty3643345318192791.159.228.368.259
Runner on first153136336121636.243.327.404.323
Runners on3062697517823270.279.353.524.371
RISP1531334211701634.316.379.647.419

Runners on includes runners in scoring position, which is the convention every reference uses. Counted from play-by-play, 2021.

Head to head

Put Kyle Seager beside up to three others.

Compare — add up to 3 more players
Kyle Seager

Similar players

Nearest 2021 seasons by discipline, contact, power and speed, on rate statistics rather than totals.

How these are computed

wOBA uses linear weights measured from this season's own play-by-play rather than published constants, and wRC+ is park-adjusted against that same league. dbWAR is our own open implementation — not fWAR or bWAR — and the full derivation, including its simplifications, is on the methodology page.