Junior Guerra

Pitcher · Career Stats, Bio & Records (2015-2021)

Junior Guerra was a pitcher who played in Major League Baseball from 2015 to 2021 for 4 teams, including the Chicago White Sox, a span of 7 seasons. Across 213 career appearances, he went 31-25 with a 4.06 ERA and 465 strikeouts.

W (Wins):
Games credited to a pitcher whose team took a lead it never surrendered while he was the pitcher of record.
ERA (Earned Run Average):
Earned runs allowed per nine innings pitched: (ER × 9) ÷ IP. The primary measure of pitching effectiveness.
SO (Strikeouts):
For a batter, times retired on a third strike; for a pitcher, batters retired on a third strike.
WHIP (Walks and Hits per Inning Pitched):
Baserunners allowed per inning: (BB + H) ÷ IP. Under 1.00 is elite.

Data updated

W–L 31–25
ERA 4.06
WHIP 1.35
SO 465
Pitcher PIV -3333.4
Position
Pitcher
Bats / Throws
R / R
Height / Weight
6'0" / 235 lb
Born
1/16/1985 in San Felix, Bolívar, Venezuela
MLB Debut
2015-06-12
Last Game
2021-09-16

Full name: Junior J. Guerra

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Career Pitching Statistics

Junior Guerra — Career Pitching Statistics
W L G GS CG SHO SV IP H ER HR BB SO ERA Pitcher PIV
31 25 213 61 0 0 3 509.2 447 230 66 239 465 4.06 -3333.4

Career ERA 4.06 vs. league average 4.25 across their career seasons — near league average.

Season-by-Season Pitching

Pitching Career Arc

Click a stat to plot it across every season.

Junior Guerra — Season-by-Season Pitching
Year Team Lg W L G GS CG SHO SV IP H ER BB SO ERA Lg ERA Pitcher PIV
2015 CHA AL 0 0 3 0 0 0 0 4.0 7 3 1 3 6.75 — 0.0
2016 MIL NL 9 3 20 20 0 0 0 121.2 94 38 43 100 2.81 4.19 (+33%) 1510.4
2017 MIL NL 1 4 21 14 0 0 0 70.1 61 40 43 67 5.12 4.36 (-17%) -3914.4
2018 MIL NL 6 9 31 26 0 0 0 141.0 143 64 55 136 4.09 4.15 (+2%) -316.5
2019 MIL NL 9 5 72 0 0 0 3 83.2 58 33 36 77 3.55 4.51 (+21%) -24.7
2020 ARI NL 1 2 25 0 0 0 0 23.2 17 8 15 21 3.04 4.45 (+32%) 197.6
2021 LAA AL 5 2 41 1 0 0 0 65.1 67 44 46 61 6.06 4.27 (-42%) -785.7
Career · 7 seasons 31 25 213 61 0 0 3 509.2 447 230 239 465 4.06 — -3,333

Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.

Career Batting Statistics

Junior Guerra — Career Batting Statistics
G AB R H 2B 3B HR RBI SB BB SO AVG OBP SLG OPS PIV
213 91 4 13 5 0 0 0 0 0 33 .143 .143 .198 .341 0

Career AVG .143 vs. league average .251 across their career seasons — 43.1% below league average.

Career OBP .143 vs. league average .320 across their career seasons — 55.4% below league average.

Career SLG .198 vs. league average .417 across their career seasons — 52.6% below league average.

Career OPS .341 vs. league average .737 across their career seasons — 53.8% below league average.

Season-by-Season Batting

Career Arc

Click a stat to plot it across every season.

Junior Guerra — Season-by-Season Batting
Year Team Lg G AB R H 2B 3B HR RBI SB BB SO AVG Lg AVG Lg OBP Lg SLG Lg OPS PIV
2015 CHA AL 3 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
2016 MIL NL 20 35 2 8 2 0 0 0 0 0 13 .229 — — — — 0.0
2017 MIL NL 21 16 0 0 0 0 0 0 0 0 4 .000 — — — — 0.0
2018 MIL NL 31 35 2 4 3 0 0 0 0 0 13 .114 — — — — 0.0
2019 MIL NL 72 3 0 1 0 0 0 0 0 0 2 .333 — — — — 0.0
2020 ARI NL 25 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
2021 LAA AL 41 2 0 0 0 0 0 0 0 0 1 .000 — — — — 0.0
Career · 7 seasons 213 91 4 13 5 0 0 0 0 0 33 .143 — — — — 0

Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.

Postseason Statistics

Playoff Career Batting

Junior Guerra — Playoff Career Batting
G AB R H 2B 3B HR RBI BB SO AVG
2 1 0 0 0 0 0 0 0 1 .000

Playoff Batting by Year

Junior Guerra — Playoff Batting by Year
Year Round Team G AB R H 2B 3B HR RBI BB SO AVG
2018 NLCS MIL 2 1 0 0 0 0 0 0 0 1 .000

Playoff Career Pitching

Junior Guerra — Playoff Career Pitching
W L G GS SV IP H ER BB SO ERA
0 1 2 0 0 4.2 2 1 0 5 1.93

Playoff Pitching by Year

Junior Guerra — Playoff Pitching by Year
Year Round Team W L G GS SV IP H ER BB SO ERA
2018 NLCS MIL 0 1 2 0 0 4.2 2 1 0 5 1.93

Game Log & Splits

View full game log (426 games) →

Per-game data from Retrosheet (regular season, through 2025).

Batting — Home / Away

Junior Guerra — Batting — Home / Away
SplitGABRHHRRBIAVG
Home103483600.125
Away110431700.163

Pitching — Home / Away

Junior Guerra — Pitching — Home / Away
SplitGIPHERBBSOERA
Home103268.2213951192533.18
Away110241.02341351202125.04

Last 10 Games — Batting

Junior Guerra — Last 10 Games — Batting
DateTmOppResABRH2B3BHRRBIBBSO
2021-09-16 LAACHWW 000000000
2021-09-08 LAASDPL 200000001
2021-08-31 LAANYYW 000000000
2021-08-30 LAANYYW 000000000
2021-08-28 LAASDPW 000000000
2021-08-24 LAABALW 000000000
2021-08-20 LAACLEL 000000000
2021-08-16 LAANYYL 000000000
2021-08-14 LAAHOUL 000000000
2021-08-10 LAATORW 000000000

Last 10 Games — Pitching

Junior Guerra — Last 10 Games — Pitching
DateTmOppDecIPHRERBBSOHR
2021-09-16 LAACHW — 1.0433210
2021-09-08 LAASDP — 2.0000220
2021-08-31 LAANYY — 0.1100100
2021-08-30 LAANYY W 2.0122141
2021-08-28 LAASDP — 1.2000120
2021-08-24 LAABAL W 2.2744040
2021-08-20 LAACLE — 2.0433330
2021-08-16 LAANYY — 0.1000000
2021-08-14 LAAHOU — 1.0444331
2021-08-10 LAATOR W 1.0000100

Fielding Statistics

Career Fielding Totals by Position

Junior Guerra — Career Fielding Totals by Position
Position G GS PO A E DP
P 213 61 37 49 6 7

Season-by-Season Fielding

Junior Guerra — Season-by-Season Fielding
Year Team Pos G GS PO A E DP
2015 CHA P 3 0 1 2 0 1
2016 MIL P 20 20 10 11 2 1
2017 MIL P 21 14 4 6 2 1
2018 MIL P 31 26 12 10 1 2
2019 MIL P 72 0 5 7 0 0
2020 ARI P 25 0 2 3 1 0
2021 LAA P 41 1 3 10 0 2

Career Games by Position

Position Diamond

Circle size = games played at each position.

Junior Guerra — Career Games by Position
Position Games
Pitcher 213

Most Similar Players

Career comps based on counting + rate stats and primary position. Score is relative — closest peer anchors at ~98%.

Career Spans

Junior Guerra (highlighted) compared to peers across the same era.

  1. 98
    Ken Howell
    38-48, 3.95 ERA
  2. 94
    Clay Hensley
    28-34, 4.00 ERA
  3. 93
    Archie Bradley
    30-29, 4.03 ERA
  4. 91
    Calvin Schiraldi
    32-39, 4.28 ERA
  5. 91
    John Gant
    24-26, 3.89 ERA
  6. 90
    Randall Delgado
    30-29, 4.10 ERA

Junior Guerra: the record in brief

According to the bio, Junior Guerra debuted on June 12, 2015 and played a final game on September 16, 2021. By club, Guerra's seasons break down as the Chicago White Sox (2015), the Milwaukee Brewers (2016 to 2019), the Arizona Diamondbacks (2020), and the Los Angeles Angels of Anaheim (2021). Guerra, born on January 16, 1985, in San Felix, Bolívar, Venezuela, is listed as a pitcher and batted and threw right-handed. Size on record: 235 pounds on a 6-foot-0 frame. Guerra's full given name, per the bio, is Junior J. Guerra.

Guerra went 31-25 with a 4.06 ERA in 213 games, 61 of them starts. The totals include 465 strikeouts. Guerra's 4.06 ERA was close to the 4.25 league figure for those seasons. Guerra won 9 games in 2016, the most of any season listed. Guerra struck out 136 batters in 2018, a career high. In 2016, one of the busiest seasons, Guerra posted a 2.81 ERA; the league figure that year was 4.19.

Frequently Asked Questions about Junior Guerra

What years did Junior Guerra play?
Junior Guerra played in Major League Baseball from 2015 to 2021.
Was Junior Guerra a pitcher?
Yes. Junior Guerra pitched in the major leagues, recording 31 wins and 465 strikeouts.
How many home runs did Junior Guerra hit?
Junior Guerra hit 0 career home runs with 13 hits.
What was Junior Guerra's career batting average?
Junior Guerra batted .143 over his career, with 13 hits in 91 at bats.
What was Junior Guerra's career ERA?
Junior Guerra finished with a 4.06 career ERA, going 31-25 with 465 strikeouts.
How many strikeouts did Junior Guerra have?
Junior Guerra recorded 465 career strikeouts.