Sonny Siebert
Pitcher · Career Stats, Bio & Records (1964-1975)
Sonny Siebert was a pitcher who played in Major League Baseball from 1964 to 1975 for 6 teams, including the Cleveland Guardians, a span of 12 seasons. Across 399 career appearances, he went 140-114 with a 3.21 ERA and 1,512 strikeouts. He also batted .173 with 12 home runs. Sonny Siebert was a 2-time All-Star. His career Pitcher PIV — Baseball Data Hub's era-adjusted measure of pitching impact — is 8639.3.
- 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
- 6'3" / 190 lb
- MLB Debut
- 1964-04-26
- Last Game
- 1975-09-25
- Awards
- 2× All-Star
Full name: Wilfred Charles Siebert
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1964 | CLE | AL | 7 | 9 | 41 | 14 | 3 | 1 | 3 | 156.0 | 142 | 56 | 57 | 144 | 3.23 | 3.58 (+10%) | 1759.5 |
| 1965 | CLE | AL | 16 | 8 | 39 | 27 | 4 | 1 | 1 | 188.2 | 139 | 51 | 46 | 191 | 2.43 | 3.50 (+30%) | 6030.3 |
| 1966 | CLE | AL | 16 | 8 | 34 | 32 | 11 | 1 | 1 | 241.0 | 193 | 75 | 62 | 163 | 2.80 | 3.52 (+20%) | 782.0 |
| 1967 | CLE | AL | 10 | 12 | 34 | 26 | 7 | 1 | 4 | 185.1 | 136 | 49 | 54 | 136 | 2.38 | 3.30 (+28%) | 328.9 |
| 1968 | CLE | AL | 12 | 10 | 31 | 30 | 8 | 4 | 0 | 206.0 | 145 | 68 | 88 | 146 | 2.97 | 2.98 (avg) | -725.8 |
| 1969 | CLE | AL | 0 | 1 | 2 | 2 | 0 | 0 | 0 | 14.0 | 10 | 5 | 8 | 6 | 3.21 | 3.61 (+11%) | -238.5 |
| 1969 | BOS | AL | 14 | 10 | 43 | 22 | 2 | 0 | 5 | 163.1 | 151 | 69 | 68 | 127 | 3.80 | 3.61 (-5%) | -1366.0 |
| 1970 | BOS | AL | 15 | 8 | 33 | 33 | 7 | 2 | 0 | 222.2 | 207 | 85 | 60 | 142 | 3.44 | 3.89 (+12%) | -330.8 |
| 1971 | BOS | AL | 16 | 10 | 32 | 32 | 12 | 4 | 0 | 235.1 | 220 | 76 | 60 | 131 | 2.91 | 3.47 (+16%) | 1375.2 |
| 1972 | BOS | AL | 12 | 12 | 32 | 30 | 7 | 3 | 0 | 196.1 | 204 | 83 | 59 | 123 | 3.80 | 3.26 (-17%) | -79.4 |
| 1973 | BOS | AL | 0 | 1 | 2 | 0 | 0 | 0 | 0 | 2.1 | 5 | 2 | 1 | 5 | 7.71 | — | 0.0 |
| 1973 | TEX | AL | 7 | 11 | 25 | 20 | 1 | 1 | 2 | 119.2 | 120 | 53 | 37 | 76 | 3.99 | 3.75 (-6%) | 774.8 |
| 1974 | SLN | NL | 8 | 8 | 28 | 20 | 5 | 3 | 0 | 133.2 | 150 | 57 | 51 | 68 | 3.84 | 3.63 (-6%) | 262.8 |
| 1975 | SDN | NL | 3 | 2 | 6 | 6 | 0 | 0 | 0 | 26.2 | 37 | 13 | 10 | 10 | 4.39 | 3.71 (-18%) | -225.9 |
| 1975 | OAK | AL | 4 | 4 | 17 | 13 | 0 | 0 | 0 | 61.0 | 60 | 25 | 31 | 44 | 3.69 | 3.71 (+1%) | 292.1 |
| Career · 15 seasons | 140 | 114 | 399 | 307 | 67 | 21 | 16 | 2,152.0 | 1,919 | 767 | 692 | 1,512 | 3.21 | — | 8,639 | ||
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 405 | 660 | 52 | 114 | 22 | 3 | 12 | 57 | 0 | 18 | 182 | .173 | .204 | .270 | .474 | -2,794 |
Career AVG .173 vs. league average .250 across their career seasons — 30.8% below league average.
Career OBP .204 vs. league average .316 across their career seasons — 35.4% below league average.
Career SLG .270 vs. league average .369 across their career seasons — 26.8% below league average.
Career OPS .474 vs. league average .685 across their career seasons — 30.8% 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1964 | CLE | AL | 42 | 49 | 5 | 13 | 2 | 1 | 2 | 6 | 0 | 1 | 9 | .265 | — | — | — | — | 41.2 |
| 1965 | CLE | AL | 40 | 66 | 2 | 7 | 1 | 0 | 1 | 4 | 0 | 0 | 18 | .106 | .245 (-57%) | .310 (-66%) | .371 (-55%) | .682 (-60%) | -620.5 |
| 1966 | CLE | AL | 34 | 85 | 4 | 11 | 2 | 0 | 0 | 3 | 0 | 1 | 21 | .129 | .248 (-48%) | .309 (-55%) | .376 (-59%) | .685 (-58%) | -755.5 |
| 1967 | CLE | AL | 34 | 52 | 4 | 7 | 2 | 2 | 1 | 3 | 0 | 0 | 13 | .135 | .242 (-44%) | .306 (-56%) | .357 (-14%) | .663 (-33%) | -289.8 |
| 1968 | CLE | AL | 33 | 70 | 2 | 11 | 3 | 0 | 0 | 6 | 0 | 1 | 23 | .157 | .236 (-34%) | .298 (-36%) | .340 (-41%) | .638 (-39%) | -388.4 |
| 1969 | CLE | AL | 2 | 4 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .250 | — | — | — | — | 0.0 |
| 1969 | BOS | AL | 43 | 53 | 5 | 8 | 1 | 0 | 1 | 3 | 0 | 3 | 20 | .151 | .248 (-39%) | .320 (-34%) | .369 (-39%) | .689 (-37%) | 0.0 |
| 1970 | BOS | AL | 33 | 77 | 5 | 10 | 3 | 0 | 0 | 4 | 0 | 1 | 17 | .130 | .253 (-49%) | .325 (-50%) | .385 (-56%) | .711 (-53%) | -651.5 |
| 1971 | BOS | AL | 32 | 79 | 10 | 21 | 3 | 0 | 6 | 15 | 0 | 1 | 20 | .266 | .249 (+7%) | .316 (-9%) | .365 (+46%) | .682 (+20%) | 206.0 |
| 1972 | BOS | AL | 33 | 72 | 11 | 17 | 4 | 0 | 1 | 9 | 0 | 5 | 21 | .236 | .243 (-3%) | .310 (-2%) | .353 (-6%) | .664 (-4%) | -37.1 |
| 1973 | BOS | AL | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| 1973 | TEX | AL | 25 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| 1974 | SLN | NL | 28 | 44 | 3 | 5 | 0 | 0 | 0 | 3 | 0 | 3 | 17 | .114 | — | — | — | — | 0.0 |
| 1975 | SDN | NL | 7 | 8 | 1 | 3 | 1 | 0 | 0 | 1 | 0 | 2 | 2 | .375 | — | — | — | — | 0.0 |
| 1975 | OAK | AL | 17 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | .000 | — | — | — | — | 0.0 |
| Career · 15 seasons | 405 | 660 | 52 | 114 | 22 | 3 | 12 | 57 | 0 | 18 | 182 | .173 | — | — | — | — | -2,496 | ||
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 (804 games) →Per-game data from Retrosheet (regular season, through 2025).
Batting — Home / Away
| Split | G | AB | R | H | HR | RBI | AVG |
|---|---|---|---|---|---|---|---|
| Home | 203 | 335 | 29 | 66 | 8 | 43 | .197 |
| Away | 202 | 325 | 23 | 48 | 4 | 14 | .148 |
Pitching — Home / Away
| Split | G | IP | H | ER | BB | SO | ERA |
|---|---|---|---|---|---|---|---|
| Home | 200 | 1130.0 | 1002 | 402 | 361 | 819 | 3.20 |
| Away | 199 | 1021.2 | 917 | 365 | 331 | 693 | 3.22 |
Last 10 Games — Batting
| Date | Tm | Opp | Res | AB | R | H | 2B | 3B | HR | RBI | BB | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1975-09-25 | OAK | CHW | L | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 1975-09-21 | OAK | KCR | L | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1975-09-18 | OAK | CHW | W | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1975-09-14 | OAK | MIN | L | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1975-09-12 | OAK | MIN | L | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1975-09-07 | OAK | TEX | W | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1975-08-31 | OAK | BOS | W | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1975-08-26 | OAK | NYY | L | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1975-08-20 | OAK | DET | W | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1975-08-09 | OAK | 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1975-09-25 | OAK | CHW | — | 1.2 | 2 | 1 | 1 | 2 | 3 | 0 |
| 1975-09-21 | OAK | KCR | — | 2.0 | 0 | 0 | 0 | 0 | 1 | 0 |
| 1975-09-18 | OAK | CHW | — | 2.2 | 3 | 2 | 1 | 1 | 0 | 0 |
| 1975-09-14 | OAK | MIN | — | 1.1 | 3 | 2 | 2 | 0 | 1 | 0 |
| 1975-09-12 | OAK | MIN | — | 3.1 | 1 | 1 | 1 | 4 | 5 | 0 |
| 1975-09-07 | OAK | TEX | W | 5.0 | 3 | 1 | 1 | 3 | 3 | 1 |
| 1975-08-31 | OAK | BOS | — | 2.2 | 4 | 3 | 3 | 3 | 1 | 0 |
| 1975-08-26 | OAK | NYY | L | 4.1 | 9 | 3 | 3 | 1 | 3 | 0 |
| 1975-08-20 | OAK | DET | W | 5.0 | 3 | 1 | 1 | 0 | 2 | 0 |
| 1975-08-09 | OAK | BOS | L | 2.2 | 6 | 5 | 5 | 2 | 3 | 2 |
Fielding Statistics
Career Fielding Totals by Position
Season-by-Season Fielding
| Year | Team | Pos | G | GS | PO | A | E | DP |
|---|---|---|---|---|---|---|---|---|
| 1964 | CLE | P | 41 | 14 | 6 | 16 | 3 | 1 |
| 1965 | CLE | P | 39 | 27 | 15 | 29 | 2 | 4 |
| 1966 | CLE | P | 34 | 32 | 19 | 46 | 4 | 4 |
| 1967 | CLE | P | 34 | 26 | 8 | 21 | 2 | 2 |
| 1968 | CLE | P | 31 | 30 | 18 | 33 | 4 | 2 |
| 1969 | CLE | P | 2 | 2 | 0 | 2 | 0 | 0 |
| 1969 | BOS | P | 43 | 22 | 6 | 34 | 1 | 6 |
| 1970 | BOS | P | 33 | 33 | 25 | 26 | 2 | 3 |
| 1971 | BOS | P | 32 | 32 | 15 | 42 | 4 | 0 |
| 1972 | BOS | P | 32 | 30 | 24 | 30 | 2 | 2 |
| 1973 | BOS | P | 2 | 0 | 0 | 0 | 0 | 0 |
| 1973 | TEX | P | 25 | 20 | 13 | 25 | 0 | 0 |
| 1974 | SLN | P | 28 | 20 | 6 | 16 | 0 | 3 |
| 1975 | SDN | P | 6 | 6 | 1 | 5 | 2 | 1 |
| 1975 | OAK | P | 17 | 13 | 3 | 4 | 0 | 0 |
Career Games by Position
Circle size = games played at each position.
| Position | Games |
|---|---|
| Pitcher | 399 |
College History
| School Name | City | State | Years Attended |
|---|---|---|---|
| University of Missouri Columbia | Columbia | MO | 1958 |
Award Voting History
| Year | Award | League | Finish | Points Won | Points Max | Votes First |
|---|---|---|---|---|---|---|
| 1966 | Most Valuable Player | AL | 28th | 1.0 | 280 | 0 |
Most Similar Players
Career comps based on counting + rate stats and primary position. Score is relative — closest peer anchors at ~98%.
Sonny Siebert (highlighted) compared to peers across the same era.
Sonny Siebert: the record in brief
Sonny Siebert's major league career runs from a debut on April 26, 1964 to a final game on September 25, 1975. The season rows list, in order, the Cleveland Indians (1964 to 1969), the Boston Red Sox (1969 to 1973), the Texas Rangers (1973), the St. Louis Cardinals (1974), the San Diego Padres (1975), and the Oakland Athletics (1975). Born on January 14, 1937, in St. Mary, MO, USA, Siebert is listed as a pitcher and threw and hit right-handed. Size on record: 6-foot-3 and 190 pounds. The bio lists the given name Wilfred Charles.
Siebert went 140-114 with a 3.21 ERA in 399 games, 307 of them starts. The same table counts 1,512 strikeouts, 67 complete games, 21 shutouts, and 16 saves. That 3.21 ERA compares with a 3.53 league average across the same seasons, 9.1% better. 1965 brought Siebert a season-high 16 wins. In 1967, one of the busiest seasons, Siebert posted a 2.38 ERA; the league figure that year was 3.30.
Frequently Asked Questions about Sonny Siebert
- What years did Sonny Siebert play?
- Sonny Siebert played in Major League Baseball from 1964 to 1975.
- Was Sonny Siebert a pitcher?
- Yes. Sonny Siebert pitched in the major leagues, recording 140 wins and 1512 strikeouts.
- How many home runs did Sonny Siebert hit?
- Sonny Siebert hit 12 career home runs with 114 hits.
- What teams did Sonny Siebert play for?
- Sonny Siebert played for 6 teams: the Cleveland Indians (1964–1969), the Boston Red Sox (1969–1973), the Texas Rangers (1973), the St. Louis Cardinals (1974), the San Diego Padres (1975), and the Oakland Athletics (1975).
- Did Sonny Siebert win a Cy Young Award?
- No. Sonny Siebert did not win the Cy Young Award.
- What awards did Sonny Siebert win?
- Sonny Siebert was selected to 2 All-Star Games.
- What were Sonny Siebert's career stats?
- In 399 games, Sonny Siebert went 140-114 with a 3.21 ERA, 1,512 strikeouts, 2,152.0 innings pitched, and 16 saves. At the plate he had 114 hits and 12 home runs.
- What position did Sonny Siebert play?
- Sonny Siebert played primarily as a pitcher, the position where he appeared in the most games.
- How tall was Sonny Siebert and how much did he weigh?
- Sonny Siebert was listed at 6 feet 3 inches and 190 pounds.
- What was Sonny Siebert's career ERA?
- Sonny Siebert finished with a 3.21 career ERA, going 140-114 with 1,512 strikeouts.
- How many strikeouts did Sonny Siebert have?
- Sonny Siebert recorded 1,512 career strikeouts.
- Is Sonny Siebert in the Hall of Fame?
- No. Sonny Siebert has not been inducted into the National Baseball Hall of Fame.
- How many All-Star Games did Sonny Siebert make?
- Sonny Siebert was selected to 2 All-Star Games.