Leo Mangum

Pitcher · Career Stats, Bio & Records (1924-1935)

Leo Mangum was a pitcher who played in Major League Baseball from 1924 to 1935 for the Chicago White Sox, the New York Giants, and the Boston Braves, a span of 12 seasons. Across 85 career appearances, he went 11-10 with a 5.37 ERA and 78 strikeouts. His career Pitcher PIV — Baseball Data Hub's era-adjusted measure of pitching impact — is 267.0.

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 11–10
ERA 5.37
WHIP 1.61
SO 78
Pitcher PIV 267.0
Position
Pitcher
Bats / Throws
R / R
Height / Weight
6'1" / 187 lb
Born
5/24/1896 in Durham, NC, USA
Died
7/9/1974 in Lima, OH, USA
MLB Debut
1924-07-11
Last Game
1935-05-11

Full name: Leo Allan Mangum

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Career Pitching Statistics

Leo Mangum — Career Pitching Statistics
W L G GS CG SHO SV IP H ER HR BB SO ERA Pitcher PIV
11 10 85 16 4 1 1 258.1 343 154 15 72 78 5.37 267.0

Career ERA 5.37 vs. league average 4.21 across their career seasons — 27.4% worse than league average.

Season-by-Season Pitching

Pitching Career Arc

Click a stat to plot it across every season.

Leo Mangum — Season-by-Season Pitching
Year Team Lg W L G GS CG SHO SV IP H ER BB SO ERA Lg ERA Pitcher PIV
1924 CHA AL 1 4 13 7 1 0 0 47.0 69 37 25 12 7.09 4.13 (-72%) -1242.8
1925 CHA AL 1 0 7 0 0 0 0 15.0 25 13 6 6 7.80 4.55 (-71%) 206.8
1928 NY1 NL 0 0 1 1 0 0 0 3.0 6 5 5 1 15.00 — 0.0
1932 BSN NL 0 0 7 0 0 0 0 10.1 17 6 0 3 5.23 4.13 (-27%) 83.4
1933 BSN NL 4 3 25 5 2 1 0 84.0 93 31 11 28 3.32 3.86 (+14%) 1944.1
1934 BSN NL 5 3 29 3 1 0 1 94.1 127 60 23 28 5.72 4.29 (-33%) -724.5
1935 BSN NL 0 0 3 0 0 0 0 4.2 6 2 2 0 3.86 — 0.0
Career · 7 seasons 11 10 85 16 4 1 1 258.1 343 154 72 78 5.37 — 267

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

Leo Mangum — Career Batting Statistics
G AB R H 2B 3B HR RBI SB BB SO AVG OBP SLG OPS PIV
85 75 7 15 0 1 0 3 0 4 8 .200 .241 .227 .467 0

Career AVG .200 vs. league average .280 across their career seasons — 28.5% below league average.

Career OBP .241 vs. league average .341 across their career seasons — 29.5% below league average.

Career SLG .227 vs. league average .394 across their career seasons — 42.4% below league average.

Career OPS .467 vs. league average .735 across their career seasons — 36.4% below league average.

Season-by-Season Batting

Career Arc

Click a stat to plot it across every season.

Leo Mangum — 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
1924 CHA AL 13 14 2 1 0 0 0 0 0 3 2 .071 — — — — 0.0
1925 CHA AL 7 4 1 2 0 0 0 1 0 1 0 .500 — — — — 0.0
1928 NY1 NL 1 1 1 1 0 0 0 1 0 0 0 1.000 — — — — 0.0
1932 BSN NL 7 2 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
1933 BSN NL 25 22 1 2 0 0 0 0 0 0 4 .091 — — — — 0.0
1934 BSN NL 29 32 2 9 0 1 0 1 0 0 2 .281 — — — — 0.0
1935 BSN NL 3 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
Career · 7 seasons 85 75 7 15 0 1 0 3 0 4 8 .200 — — — — 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.

Game Log & Splits

View full game log (170 games) →

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

Batting — Home / Away

Leo Mangum — Batting — Home / Away
SplitGABRHHRRBIAVG
Home35313903.290
Away50443600.136

Pitching — Home / Away

Leo Mangum — Pitching — Home / Away
SplitGIPHERBBSOERA
Home35111.11445431374.37
Away50146.01999840426.04

Last 10 Games — Batting

Leo Mangum — Last 10 Games — Batting
DateTmOppResABRH2B3BHRRBIBBSO
1935-05-11 BSNCHCL 000000000
1935-05-04 BSNSTLL 000000000
1935-04-21 BSNBROL 000000000
1934-09-25 BSNBROW 100000000
1934-09-21 BSNNY1L 100000010
1934-09-04 BSNBROW 300000000
1934-08-29 BSNPITL 100000000
1934-08-26 BSNPITW 302000000
1934-08-18 BSNSTLL 100000000
1934-08-10 BSNNY1L 000000000

Last 10 Games — Pitching

Leo Mangum — Last 10 Games — Pitching
DateTmOppDecIPHRERBBSOHR
1935-05-11 BSNCHC — 1.2432100
1935-05-04 BSNSTL — 1.0100000
1935-04-21 BSNBRO — 2.0100100
1934-09-25 BSNBRO W 3.1311111
1934-09-21 BSNNY1 — 4.2321000
1934-09-04 BSNBRO W 9.01011101
1934-08-29 BSNPIT L 4.0655210
1934-08-26 BSNPIT W 4.1744100
1934-08-18 BSNSTL — 1.1986001
1934-08-10 BSNNY1 — 1.0000100

Fielding Statistics

Career Fielding Totals by Position

Leo Mangum — Career Fielding Totals by Position
Position G GS PO A E DP
P 85 0 9 77 3 8

Season-by-Season Fielding

Leo Mangum — Season-by-Season Fielding
Year Team Pos G GS PO A E DP
1924 CHA P 13 0 3 11 2 1
1925 CHA P 7 0 0 2 0 1
1928 NY1 P 1 0 0 3 0 1
1932 BSN P 7 0 2 6 0 2
1933 BSN P 25 0 2 27 0 1
1934 BSN P 29 0 2 27 1 2
1935 BSN P 3 0 0 1 0 0

Career Games by Position

Position Diamond

Circle size = games played at each position.

Leo Mangum — Career Games by Position
Position Games
Pitcher 85

Leo Mangum: the record in brief

Between the debut on July 11, 1924 and the final game on May 11, 1935, Leo Mangum built the record summarized on this page. By club, Mangum's seasons break down as the Chicago White Sox (1924 through 1925), the New York Giants (1928), and the Boston Braves (1932 through 1935). Born on May 24, 1896, in Durham, NC, USA, Mangum is listed as a pitcher and both batted and threw right-handed. Size on record: 6 feet, 1 inch and 187 pounds. Mangum died on July 9, 1974, in Lima, OH, USA. Leo Mangum was the playing name; the full given name is Leo Allan.

Mangum pitched in 85 games, starting 16, and finished with a 11-10 record and 5.37 ERA. The totals include 78 strikeouts. The league ERA over Mangum's seasons was 4.21, so the 5.37 figure ran 27.4% worse than average. The best win total was 5, in 1934. 1933 was Mangum's sharpest full season, a 3.32 ERA against the league's 3.86.

Frequently Asked Questions about Leo Mangum

What years did Leo Mangum play?
Leo Mangum played in Major League Baseball from 1924 to 1935.
Was Leo Mangum a pitcher?
Yes. Leo Mangum pitched in the major leagues, recording 11 wins and 78 strikeouts.
How many home runs did Leo Mangum hit?
Leo Mangum hit 0 career home runs with 15 hits.
What teams did Leo Mangum play for?
Leo Mangum played for 3 teams: the Chicago White Sox (1924–1925), the New York Giants (1928), and the Boston Braves (1932–1935).
What were Leo Mangum's career stats?
In 85 games, Leo Mangum went 11-10 with a 5.37 ERA, 78 strikeouts, 258.1 innings pitched, and 1 saves.
What position did Leo Mangum play?
Leo Mangum played primarily as a pitcher, the position where he appeared in the most games.
How tall was Leo Mangum and how much did he weigh?
Leo Mangum was listed at 6 feet 1 inch and 187 pounds.
What was Leo Mangum's career ERA?
Leo Mangum finished with a 5.37 career ERA, going 11-10 with 78 strikeouts.
How many strikeouts did Leo Mangum have?
Leo Mangum recorded 78 career strikeouts.
Is Leo Mangum in the Hall of Fame?
No. Leo Mangum has not been inducted into the National Baseball Hall of Fame.