Del Mason
Pitcher · Career Stats, Bio & Records (1904-1907)
Del Mason was a pitcher who played in Major League Baseball from 1904 to 1907 for the Washington Senators and the Cincinnati Reds, a span of 4 seasons. Across 32 career appearances, he went 5-16 with a 3.72 ERA and 65 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
- Position
- Pitcher
- Bats / Throws
- R / R
- Height / Weight
- 6'0" / 160 lb
- Died
- 12/31/1962 in Winter Park, FL, USA
- MLB Debut
- 1904-04-23
- Last Game
- 1907-08-16
Full name: Adelbert William Mason
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1904 | WS1 | AL | 0 | 3 | 5 | 3 | 2 | 0 | 0 | 33.0 | 45 | 22 | 13 | 16 | 6.00 | 2.66 (-126%) | -451.3 |
| 1906 | CIN | NL | 0 | 1 | 2 | 1 | 1 | 0 | 0 | 12.0 | 10 | 6 | 6 | 4 | 4.50 | 2.68 (-68%) | -560.0 |
| 1907 | CIN | NL | 5 | 12 | 25 | 17 | 13 | 1 | 0 | 146.0 | 144 | 51 | 55 | 45 | 3.14 | 2.50 (-26%) | -1806.7 |
| Career · 3 seasons | 5 | 16 | 32 | 21 | 16 | 1 | 0 | 191.0 | 199 | 79 | 74 | 65 | 3.72 | — | -2,818 | ||
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 32 | 64 | 1 | 8 | 0 | 0 | 0 | 3 | 0 | 2 | 8 | .125 | .152 | .125 | .277 | 0 |
Career AVG .125 vs. league average .247 across their career seasons — 49.3% below league average.
Career OBP .152 vs. league average .304 across their career seasons — 50.2% below league average.
Career SLG .125 vs. league average .315 across their career seasons — 60.3% below league average.
Career OPS .277 vs. league average .619 across their career seasons — 55.4% 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1904 | WS1 | AL | 5 | 15 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | .000 | — | — | — | — | 0.0 |
| 1906 | CIN | NL | 2 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| 1907 | CIN | NL | 25 | 44 | 1 | 8 | 0 | 0 | 0 | 3 | 0 | 2 | 5 | .182 | — | — | — | — | 0.0 |
| Career · 3 seasons | 32 | 64 | 1 | 8 | 0 | 0 | 0 | 3 | 0 | 2 | 8 | .125 | — | — | — | — | 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 (64 games) →Per-game data from Retrosheet (regular season, through 2025).
Batting — Home / Away
| Split | G | AB | R | H | HR | RBI | AVG |
|---|---|---|---|---|---|---|---|
| Home | 13 | 18 | 1 | 1 | 0 | 1 | .056 |
| Away | 19 | 46 | 0 | 7 | 0 | 2 | .152 |
Pitching — Home / Away
| Split | G | IP | H | ER | BB | SO | ERA |
|---|---|---|---|---|---|---|---|
| Home | 13 | 70.2 | 71 | 9 | 22 | 26 | 1.15 |
| Away | 19 | 118.1 | 128 | 13 | 52 | 39 | 0.99 |
Last 10 Games — Batting
| Date | Tm | Opp | Res | AB | R | H | 2B | 3B | HR | RBI | BB | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1907-08-16 | CIN | NY1 | L | 4 | 0 | 2 | 0 | 0 | 0 | 2 | 0 | 1 |
| 1907-08-01 | CIN | PHI | L | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1907-07-29 | CIN | PHI | L | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1907-07-16 | CIN | PHI | L | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1907-07-11 | CIN | NY1 | L | 3 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1907-07-06 | CIN | BSN | L | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1907-07-02 | CIN | CHC | L | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1907-06-30 | CIN | STL | W | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1907-06-30 | CIN | STL | L | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1907-06-27 | CIN | STL | W | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Last 10 Games — Pitching
| Date | Tm | Opp | Dec | IP | H | R | ER | BB | SO | HR |
|---|---|---|---|---|---|---|---|---|---|---|
| 1907-08-16 | CIN | NY1 | — | 9.0 | 8 | 4 | 0 | 3 | 6 | 0 |
| 1907-08-01 | CIN | PHI | — | 4.0 | 3 | 2 | 0 | 2 | 1 | 0 |
| 1907-07-29 | CIN | PHI | — | 1.0 | 0 | 0 | 0 | 1 | 0 | 0 |
| 1907-07-16 | CIN | PHI | — | 2.0 | 2 | 1 | 0 | 3 | 1 | 0 |
| 1907-07-11 | CIN | NY1 | L | 8.0 | 14 | 10 | 0 | 4 | 2 | 2 |
| 1907-07-06 | CIN | BSN | — | 3.0 | 6 | 3 | 0 | 1 | 1 | 0 |
| 1907-07-02 | CIN | CHC | — | 1.0 | 1 | 1 | 0 | 1 | 0 | 0 |
| 1907-06-30 | CIN | STL | — | 1.0 | 2 | 1 | 0 | 0 | 1 | 0 |
| 1907-06-30 | CIN | STL | — | 1.0 | 2 | 3 | 0 | 0 | 0 | 0 |
| 1907-06-27 | CIN | STL | W | 4.2 | 4 | 0 | 0 | 1 | 0 | 0 |
Fielding Statistics
Career Games by Position
Circle size = games played at each position.
| Position | Games |
|---|---|
| Pitcher | 32 |
College History
| School Name | City | State | Years Attended |
|---|---|---|---|
| Rollins College | Winter Park | FL | 1908, 1910 |
Del Mason: the record in brief
Between the debut on April 23, 1904 and the final game on August 16, 1907, Del Mason built the record summarized on this page. The season rows list, in order, the Washington Senators (1904) and the Cincinnati Reds (1906 through 1907). The bio lists Mason as a pitcher who batted and threw right-handed. Height and weight on file: 160 pounds on a 6-foot-0 frame. The birth record reads October 29, 1883, in Newfane, NY, USA. Mason died on December 31, 1962, in Winter Park, FL, USA. The bio lists the given name Adelbert William.
Mason's career pitching line is 5 wins, 16 losses and a 3.72 ERA over 32 appearances. Mason had 65 strikeouts and 16 complete games. Against a 2.61 league ERA for the same seasons, the 3.72 mark was 42.6% worse. No season topped the 5 wins of 1907. In 1907, one of the busiest seasons, Mason posted a 3.14 ERA; the league figure that year was 2.50.
Frequently Asked Questions about Del Mason
- What years did Del Mason play?
- Del Mason played in Major League Baseball from 1904 to 1907.
- Was Del Mason a pitcher?
- Yes. Del Mason pitched in the major leagues, recording 5 wins and 65 strikeouts.
- How many home runs did Del Mason hit?
- Del Mason hit 0 career home runs with 8 hits.
- What was Del Mason's career batting average?
- Del Mason batted .125 over his career, with 8 hits in 64 at bats.
- How many RBI did Del Mason have?
- Del Mason drove in 3 runs in his career.
- What was Del Mason's career ERA?
- Del Mason finished with a 3.72 career ERA, going 5-16 with 65 strikeouts.