DataBaseball
2026
Alex D. Mejia headshot

3B · 2017

Alex D. Mejia

Age
26
B/T
R/R
Height
6' 1"
Weight
200 lb
Born
January 18, 1991 in Sylmar, CA, USA
MLB debut
June 29, 2017
dbWAR
-.5
1 season(s)
PA
49
AVG
.109
OBP
.146
SLG
.174
wRC+
-24
100 = avg

Alex D. Mejia is a third baseman for the St. Louis Cardinals. In 2017 he hit 1 home run and knocked in 3 RBIs, notching 5 hits across 49 plate appearances in 24 games. His batting average was .109, 57.4% lower than the league average of .255. He reached base at a .146 clip and slugged .174, for an OPS of .320, 57.4% lower than the league mark of .750. He averaged 83.7 mph off the bat, hit 26.7% of balls in play at 95 mph or better, barrelled 3.3% of them and made contact on 73.2% of his swings. Adjusted for his ballpark and league, his -24 wRC+ puts his offence 124% below average. That comes to -0.5 dbWAR — -7.4 runs with the bat, -0.0 on the bases, +0.3 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, 2017.

wRC+-24
wOBA.144
ISO.065
BB%4.1%
WAR-.5

How the WAR is built

Runs above replacement, 2017. These four terms sum to -5.5 runs, divided by runs-per-win to give WAR.

Batting-7.4Baserunning-0.0Position+0.3Replacement+1.6
BattingBaserunningPositionReplacement

Batting

Standard and advanced, by season.

Trend
201724495130213.109.146.174.065.1254.1%26.5%.144-7.4-24-0.5

Platoon splits

How he hits left- and right-handed pitching.

Batting by the hand the pitcher throws with, 2017. Counted from play-by-play, so totals can differ from the box-score season line by a plate appearance or two.
SplitPAABHHRBBSOAVGOBPSLGwOBAK%
vs LHP15153103.200.200.400.24920.0%
vs RHP343120210.065.121.065.09629.4%

Spray chart

Where every ball he put in play landed, 2017.

Loading 33 batted balls…

Contact quality

How hard and at what angle he hits it, over 30 tracked batted balls in 2017. Percentiles are against qualified batters.

Barrel rate
3.3%
1 barrels
Exit velocity
83.7
mph average
Max exit velo
103.6
mph, hardest hit
Hard hit
26.7%
95 mph or better
Sweet spot
23.3%
8–32° launch
Launch angle
2.9°
average
Barrel rate3.3%
Exit velocity83.7 mph
Hard hit rate26.7%
Contact rate73.2%

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, 2017.

1 AB7 AB.18211 AB3 AB2 AB7 AB6 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 .254.

Situational hitting

How Alex D. Mejia 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 situations49.109.146.174.144
Bases empty3130211110.067.097.167.115
Runner on first · thin7610012.167.286.167.226
Runners on · thin181630213.188.235.188.196
RISP · thin111020201.200.200.200.175

Runners on includes runners in scoring position, which is the convention every reference uses. Rows under 25 plate appearances are marked thin — at that size a rate moves several dozen points on one hit. Counted from play-by-play, 2017.

Head to head

Put Alex D. Mejia beside up to three others.

Compare — add up to 3 more players
Alex D. Mejia
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.