Mickey Haefner
Pitcher · Career Stats, Bio & Records (1943-1950)
Mickey Haefner was a pitcher who played in Major League Baseball from 1943 to 1950 for the Washington Senators, the Chicago White Sox, and the Boston Braves, a span of 8 seasons. Across 261 career appearances, he went 78-91 with a 3.50 ERA and 508 strikeouts. He also batted .188 with 0 home runs.
- 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
- Position
- Pitcher
- Bats / Throws
- L / L
- Height / Weight
- 5'8" / 160 lb
- Died
- 1/3/1995 in New Athens, IL, USA
- MLB Debut
- 1943-04-22
- Last Game
- 1950-09-28
Full name: Milton Arnold Haefner
Season-by-Season Pitching
Click a stat to plot it across every season.
| Year | Team | Lg | W | L | G | GS | CG | SHO | SV | IP | H | ER | BB | SO | ERA | Lg ERA | Pitcher PIV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1943 | WS1 | AL | 11 | 5 | 36 | 13 | 8 | 1 | 6 | 165.1 | 126 | 42 | 60 | 65 | 2.29 | 3.50 (+35%) | 693.3 |
| 1944 | WS1 | AL | 12 | 15 | 31 | 28 | 18 | 3 | 1 | 228.0 | 221 | 77 | 71 | 86 | 3.04 | 3.57 (+15%) | 1584.1 |
| 1945 | WS1 | AL | 16 | 14 | 37 | 28 | 19 | 1 | 3 | 238.1 | 226 | 92 | 69 | 83 | 3.47 | 3.67 (+5%) | 903.1 |
| 1946 | WS1 | AL | 14 | 11 | 33 | 27 | 17 | 2 | 1 | 227.2 | 220 | 72 | 80 | 85 | 2.85 | 3.59 (+21%) | 359.3 |
| 1947 | WS1 | AL | 10 | 14 | 31 | 28 | 14 | 4 | 1 | 193.0 | 195 | 78 | 85 | 77 | 3.64 | 3.97 (+8%) | 760.2 |
| 1948 | WS1 | AL | 5 | 13 | 28 | 20 | 4 | 0 | 0 | 147.2 | 151 | 66 | 61 | 45 | 4.02 | 4.10 (+2%) | -141.2 |
| 1949 | WS1 | AL | 5 | 5 | 19 | 12 | 4 | 1 | 0 | 91.2 | 85 | 45 | 53 | 23 | 4.42 | 4.12 (-7%) | -1567.5 |
| 1949 | CHA | AL | 4 | 6 | 14 | 12 | 4 | 1 | 1 | 80.1 | 84 | 39 | 41 | 17 | 4.37 | 4.12 (-6%) | -2297.8 |
| 1950 | CHA | AL | 1 | 6 | 24 | 9 | 2 | 0 | 0 | 70.2 | 83 | 45 | 45 | 17 | 5.73 | 4.36 (-31%) | -3114.7 |
| 1950 | BSN | NL | 0 | 2 | 8 | 2 | 1 | 0 | 0 | 24.0 | 23 | 15 | 12 | 10 | 5.62 | 4.36 (-29%) | -310.2 |
| Career · 10 seasons | 78 | 91 | 261 | 179 | 91 | 13 | 13 | 1,466.2 | 1,414 | 571 | 577 | 508 | 3.50 | — | -3,131 | ||
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
| G | AB | R | H | 2B | 3B | HR | RBI | SB | BB | SO | AVG | OBP | SLG | OPS | PIV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 262 | 448 | 28 | 84 | 9 | 1 | 0 | 24 | 0 | 50 | 80 | .188 | .269 | .212 | .481 | -1,562 |
Career AVG .188 vs. league average .261 across their career seasons — 28.2% below league average.
Career OBP .269 vs. league average .334 across their career seasons — 19.4% below league average.
Career SLG .212 vs. league average .369 across their career seasons — 42.5% below league average.
Career OPS .481 vs. league average .703 across their career seasons — 31.5% below league average.
Season-by-Season Batting
Click a stat to plot it across every season.
| Year | Team | Lg | G | AB | R | H | 2B | 3B | HR | RBI | SB | BB | SO | AVG | Lg AVG | Lg OBP | Lg SLG | Lg OPS | PIV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1943 | WS1 | AL | 36 | 45 | 4 | 6 | 1 | 1 | 0 | 4 | 0 | 5 | 9 | .133 | — | — | — | — | -258.2 |
| 1944 | WS1 | AL | 31 | 70 | 4 | 11 | 1 | 0 | 0 | 6 | 0 | 6 | 12 | .157 | .261 (-40%) | .325 (-31%) | .357 (-52%) | .683 (-42%) | -441.6 |
| 1945 | WS1 | AL | 37 | 82 | 8 | 20 | 1 | 0 | 0 | 5 | 0 | 9 | 13 | .244 | .260 (-7%) | .328 (-3%) | .354 (-28%) | .683 (-16%) | -172.7 |
| 1946 | WS1 | AL | 33 | 74 | 6 | 15 | 2 | 0 | 0 | 3 | 0 | 10 | 15 | .203 | .256 (-21%) | .328 (-10%) | .358 (-36%) | .687 (-23%) | -241.3 |
| 1947 | WS1 | AL | 31 | 59 | 4 | 8 | 0 | 0 | 0 | 1 | 0 | 7 | 9 | .136 | .262 (-48%) | .336 (-32%) | .376 (-64%) | .712 (-49%) | -447.9 |
| 1948 | WS1 | AL | 28 | 43 | 1 | 7 | 1 | 0 | 0 | 3 | 0 | 3 | 9 | .163 | — | — | — | — | 0.0 |
| 1949 | WS1 | AL | 20 | 25 | 1 | 5 | 2 | 0 | 0 | 1 | 0 | 3 | 3 | .200 | — | — | — | — | 0.0 |
| 1949 | CHA | AL | 14 | 23 | 0 | 6 | 0 | 0 | 0 | 0 | 0 | 4 | 7 | .261 | — | — | — | — | 0.0 |
| 1950 | CHA | AL | 24 | 20 | 0 | 4 | 0 | 0 | 0 | 1 | 0 | 3 | 3 | .200 | — | — | — | — | 0.0 |
| 1950 | BSN | NL | 8 | 7 | 0 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | .286 | — | — | — | — | 0.0 |
| Career · 10 seasons | 262 | 448 | 28 | 84 | 9 | 1 | 0 | 24 | 0 | 50 | 80 | .188 | — | — | — | — | -1,562 | ||
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 (523 games) →Per-game data from Retrosheet (regular season, through 2025).
Batting — Home / Away
| Split | G | AB | R | H | HR | RBI | AVG |
|---|---|---|---|---|---|---|---|
| Home | 133 | 241 | 11 | 50 | 0 | 14 | .207 |
| Away | 129 | 207 | 17 | 34 | 0 | 10 | .164 |
Pitching — Home / Away
| Split | G | IP | H | ER | BB | SO | ERA |
|---|---|---|---|---|---|---|---|
| Home | 133 | 834.1 | 727 | 256 | 300 | 306 | 2.76 |
| Away | 128 | 633.0 | 687 | 325 | 277 | 203 | 4.62 |
Last 10 Games — Batting
| Date | Tm | Opp | Res | AB | R | H | 2B | 3B | HR | RBI | BB | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1950-09-28 | BSN | BRO | L | 2 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1950-09-09 | BSN | PHI | L | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1950-09-01 | BSN | PHI | L | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1950-08-31 | BSN | BRO | L | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1950-08-24 | BSN | CHC | L | 3 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 |
| 1950-08-21 | BSN | STL | L | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1950-08-15 | BSN | PHI | L | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1950-08-13 | BSN | BRO | L | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1950-08-06 | CHW | BOS | L | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1950-08-05 | CHW | BOS | L | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Last 10 Games — Pitching
| Date | Tm | Opp | Dec | IP | H | R | ER | BB | SO | HR |
|---|---|---|---|---|---|---|---|---|---|---|
| 1950-09-28 | BSN | BRO | L | 6.1 | 5 | 6 | 6 | 3 | 1 | 1 |
| 1950-09-09 | BSN | PHI | — | 0.1 | 1 | 0 | 0 | 0 | 0 | 0 |
| 1950-09-01 | BSN | PHI | — | 1.0 | 3 | 2 | 2 | 1 | 0 | 0 |
| 1950-08-31 | BSN | BRO | — | 1.2 | 1 | 2 | 2 | 1 | 0 | 1 |
| 1950-08-24 | BSN | CHC | L | 8.0 | 10 | 4 | 3 | 2 | 4 | 0 |
| 1950-08-21 | BSN | STL | — | 1.1 | 1 | 1 | 1 | 2 | 2 | 1 |
| 1950-08-15 | BSN | PHI | — | 4.1 | 2 | 0 | 0 | 2 | 3 | 0 |
| 1950-08-13 | BSN | BRO | — | 1.1 | 0 | 0 | 0 | 1 | 0 | 0 |
| 1950-08-06 | CHW | BOS | — | 1.0 | 0 | 0 | 0 | 1 | 0 | 0 |
| 1950-08-05 | CHW | BOS | — | 1.1 | 4 | 3 | 2 | 2 | 1 | 0 |
Fielding Statistics
Career Fielding Totals by Position
Season-by-Season Fielding
| Year | Team | Pos | G | GS | PO | A | E | DP |
|---|---|---|---|---|---|---|---|---|
| 1943 | WS1 | P | 36 | 0 | 7 | 31 | 0 | 3 |
| 1944 | WS1 | P | 31 | 0 | 8 | 45 | 1 | 5 |
| 1945 | WS1 | P | 37 | 0 | 10 | 53 | 3 | 1 |
| 1946 | WS1 | P | 33 | 0 | 13 | 36 | 3 | 2 |
| 1947 | WS1 | P | 31 | 0 | 7 | 27 | 0 | 3 |
| 1948 | WS1 | P | 28 | 0 | 4 | 38 | 1 | 2 |
| 1949 | WS1 | P | 19 | 0 | 0 | 26 | 1 | 0 |
| 1949 | CHA | P | 14 | 0 | 2 | 17 | 2 | 3 |
| 1950 | CHA | P | 24 | 0 | 2 | 10 | 0 | 2 |
| 1950 | BSN | P | 8 | 0 | 0 | 4 | 0 | 1 |
Career Games by Position
Circle size = games played at each position.
| Position | Games |
|---|---|
| Pitcher | 261 |
Most Similar Players
Career comps based on counting + rate stats and primary position. Score is relative — closest peer anchors at ~98%.
Mickey Haefner (highlighted) compared to peers across the same era.
Mickey Haefner: the record in brief
Between the debut on April 22, 1943 and the final game on September 28, 1950, Mickey Haefner built the record summarized on this page. The season rows list, in order, the Washington Senators (1943 to 1949), the Chicago White Sox (1949 to 1950), and the Boston Braves (1950). At 5'8" and 160 pounds, Haefner is listed as a pitcher. Haefner batted and threw left-handed, per the bio block. The recorded birth is October 9, 1912, in Lenzburg, IL, USA. Haefner died on January 3, 1995, in New Athens, IL, USA. Mickey Haefner was the playing name; the full given name is Milton Arnold.
Haefner pitched in 261 games, starting 179, and finished with a 78-91 record and 3.50 ERA. Also on Haefner's record: 508 strikeouts, 91 complete games, 13 shutouts, and 13 saves. Against a 3.84 league ERA for the same years, Haefner was 8.8% better. 1945 brought Haefner a season-high 16 wins. Haefner struck out 86 batters in 1944, a career high.
Frequently Asked Questions about Mickey Haefner
- What years did Mickey Haefner play?
- Mickey Haefner played in Major League Baseball from 1943 to 1950.
- Was Mickey Haefner a pitcher?
- Yes. Mickey Haefner pitched in the major leagues, recording 78 wins and 508 strikeouts.
- How many home runs did Mickey Haefner hit?
- Mickey Haefner hit 0 career home runs with 84 hits.
- What was Mickey Haefner's career batting average?
- Mickey Haefner batted .188 over his career, with 84 hits in 448 at bats.
- How many RBI did Mickey Haefner have?
- Mickey Haefner drove in 24 runs in his career.
- What was Mickey Haefner's career ERA?
- Mickey Haefner finished with a 3.50 career ERA, going 78-91 with 508 strikeouts.