Dave Heaverlo
Pitcher · Career Stats, Bio & Records (1975-1981)
Dave Heaverlo was a pitcher who played in Major League Baseball from 1975 to 1981 for the San Francisco Giants, the Athletics, and the Seattle Mariners, a span of 7 seasons. Across 356 career appearances, he went 26-26 with a 3.41 ERA, 288 strikeouts, and 26 saves. His career Pitcher PIV — Baseball Data Hub's era-adjusted measure of pitching impact — is 813.6.
- 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
- 6'2" / 200 lb
- MLB Debut
- 1975-04-14
- Last Game
- 1981-09-27
Full name: David Wallace Heaverlo
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1975 | SFN | NL | 3 | 1 | 42 | 0 | 0 | 0 | 1 | 64.0 | 62 | 17 | 31 | 35 | 2.39 | 3.71 (+36%) | 504.3 |
| 1976 | SFN | NL | 4 | 4 | 61 | 0 | 0 | 0 | 1 | 75.0 | 85 | 37 | 15 | 40 | 4.44 | 3.51 (-26%) | 1754.6 |
| 1977 | SFN | NL | 5 | 1 | 56 | 0 | 0 | 0 | 1 | 98.2 | 92 | 28 | 21 | 58 | 2.55 | 4.00 (+36%) | 978.6 |
| 1978 | OAK | AL | 3 | 6 | 69 | 0 | 0 | 0 | 10 | 130.0 | 141 | 47 | 41 | 71 | 3.25 | 3.69 (+12%) | 263.8 |
| 1979 | OAK | AL | 4 | 11 | 62 | 0 | 0 | 0 | 9 | 85.2 | 97 | 40 | 42 | 40 | 4.20 | 4.00 (-5%) | -1005.4 |
| 1980 | SEA | AL | 6 | 3 | 60 | 0 | 0 | 0 | 4 | 78.2 | 75 | 34 | 35 | 42 | 3.89 | 3.84 (-1%) | -1682.4 |
| 1981 | OAK | AL | 1 | 0 | 6 | 0 | 0 | 0 | 0 | 5.2 | 7 | 1 | 3 | 2 | 1.59 | — | 0.0 |
| Career · 7 seasons | 26 | 26 | 356 | 0 | 0 | 0 | 26 | 537.2 | 559 | 204 | 188 | 288 | 3.41 | — | 814 | ||
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 356 | 13 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 1 | 4 | .231 | .286 | .231 | .516 | 0 |
Career AVG .231 vs. league average .260 across their career seasons — 11.4% below league average.
Career OBP .286 vs. league average .326 across their career seasons — 12.2% below league average.
Career SLG .231 vs. league average .382 across their career seasons — 39.6% below league average.
Career OPS .516 vs. league average .708 across their career seasons — 27.0% 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1975 | SFN | NL | 42 | 4 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | .500 | — | — | — | — | 0.0 |
| 1976 | SFN | NL | 61 | 3 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | .333 | — | — | — | — | 0.0 |
| 1977 | SFN | NL | 56 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 | .000 | — | — | — | — | 0.0 |
| 1978 | OAK | AL | 69 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| 1979 | OAK | AL | 62 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| 1980 | SEA | AL | 60 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| 1981 | OAK | AL | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| Career · 7 seasons | 356 | 13 | 0 | 3 | 0 | 0 | 0 | 0 | 0 | 1 | 4 | .231 | — | — | — | — | 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 (712 games) →Per-game data from Retrosheet (regular season, through 2025).
Batting — Home / Away
| Split | G | AB | R | H | HR | RBI | AVG |
|---|---|---|---|---|---|---|---|
| Home | 183 | 10 | 0 | 2 | 0 | 0 | .200 |
| Away | 173 | 3 | 0 | 1 | 0 | 0 | .333 |
Pitching — Home / Away
| Split | G | IP | H | ER | BB | SO | ERA |
|---|---|---|---|---|---|---|---|
| Home | 183 | 291.0 | 290 | 98 | 86 | 153 | 3.03 |
| Away | 173 | 246.2 | 269 | 106 | 102 | 135 | 3.87 |
Last 10 Games — Pitching
| Date | Tm | Opp | Dec | IP | H | R | ER | BB | SO | HR |
|---|---|---|---|---|---|---|---|---|---|---|
| 1981-09-27 | OAK | CHW | — | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1981-08-21 | OAK | BAL | — | 1.1 | 1 | 0 | 0 | 2 | 1 | 0 |
| 1981-08-20 | OAK | BOS | — | 0.0 | 2 | 0 | 0 | 0 | 0 | 0 |
| 1981-08-15 | OAK | LAA | — | 1.0 | 2 | 1 | 1 | 1 | 0 | 0 |
| 1981-08-10 | OAK | MIN | — | 0.2 | 2 | 0 | 0 | 0 | 0 | 0 |
| 1981-06-07 | OAK | BOS | W | 1.2 | 0 | 0 | 0 | 0 | 1 | 0 |
| 1980-10-03 | SEA | TEX | — | 1.0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1980-10-02 | SEA | KCR | — | 1.0 | 2 | 1 | 0 | 0 | 0 | 0 |
| 1980-09-25 | SEA | TEX | W | 2.2 | 3 | 2 | 2 | 0 | 2 | 1 |
| 1980-09-21 | SEA | MIL | — | 0.1 | 2 | 0 | 0 | 0 | 0 | 0 |
Fielding Statistics
Career Fielding Totals by Position
Season-by-Season Fielding
Career Games by Position
Circle size = games played at each position.
| Position | Games |
|---|---|
| Pitcher | 356 |
College History
| School Name | City | State | Years Attended |
|---|---|---|---|
| Central Washington University | Ellensburg | WA | 1969, 1970, 1971, 1972 |
Most Similar Players
Career comps based on counting + rate stats and primary position. Score is relative — closest peer anchors at ~98%.
Dave Heaverlo (highlighted) compared to peers across the same era.
Dave Heaverlo: the record in brief
Dave Heaverlo's major league career runs from a debut on April 14, 1975 to a final game on September 27, 1981. Heaverlo played for the San Francisco Giants (1975 through 1977), the Oakland Athletics (1978 through 1981), and the Seattle Mariners (1980). Heaverlo played primarily as a pitcher and both batted and threw right-handed. Born on August 25, 1950, in Ellensburg, WA, USA, Heaverlo was listed at 200 pounds on a 6-foot-2 frame. Heaverlo's full given name, per the bio, is David Wallace Heaverlo.
The pitching table credits Heaverlo with a 26-26 record and a 3.41 ERA in 356 games. Heaverlo had 288 strikeouts and 26 saves. That 3.41 ERA compares with a 3.78 league average across the same seasons, 9.6% better. No season topped the 6 wins of 1980. 1978 produced Heaverlo's most strikeouts, 71. The most saves in one season was 10, in 1978. 1977 was Heaverlo's sharpest full season, a 2.55 ERA against the league's 4.00.
Frequently Asked Questions about Dave Heaverlo
- What years did Dave Heaverlo play?
- Dave Heaverlo played in Major League Baseball from 1975 to 1981.
- Was Dave Heaverlo a pitcher?
- Yes. Dave Heaverlo pitched in the major leagues, recording 26 wins and 288 strikeouts.
- How many home runs did Dave Heaverlo hit?
- Dave Heaverlo hit 0 career home runs with 3 hits.
- What was Dave Heaverlo's career batting average?
- Dave Heaverlo batted .231 over his career, with 3 hits in 13 at bats.
- What was Dave Heaverlo's career ERA?
- Dave Heaverlo finished with a 3.41 career ERA, going 26-26 with 288 strikeouts.
- How many strikeouts did Dave Heaverlo have?
- Dave Heaverlo recorded 288 career strikeouts.