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| Given Name: | Mark William |
| Birth Date: | 1960-10-19 |
| Birth City: | Livermore |
| Birth Country: | |
| Height: | 75 cm |
| Weight: | 180 kg |
| Bats: | Left |
| Throws: | Left |
| Age: | 65 |
| Teams and Years | Batting Average | Hits | At Bats | Home Runs | Runs Batted In | Wins | Losses | Games Pitched In | Strikeouts | Shutouts | Position | Errors | Double Plays | Assists |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1980 Philadelphia Phillies | 0.500 | 1 | 2 | 0 | 0 | 0 | 0 | 2 | 5 | 0 | P | 0 | 0 | 0 |
| 1981 Philadelphia Phillies | 0.091 | 1 | 11 | 0 | 1 | 1 | 4 | 9 | 29 | 0 | P | 0 | 0 | 6 |
| 1983 San Francisco Giants | 0.133 | 4 | 30 | 0 | 1 | 6 | 4 | 20 | 83 | 2 | P | 0 | 0 | 13 |
| 1984 San Francisco Giants | 0.130 | 6 | 46 | 0 | 4 | 5 | 17 | 46 | 124 | 0 | P | 3 | 1 | 22 |
| 1985 San Francisco Giants | 0.250 | 3 | 12 | 0 | 0 | 5 | 12 | 77 | 131 | 0 | P | 0 | 0 | 12 |
| 1986 San Francisco Giants | 0.125 | 1 | 8 | 0 | 0 | 5 | 7 | 67 | 90 | 0 | P | 3 | 1 | 11 |
| 1987 San Diego Padres | 0.286 | 2 | 7 | 0 | 0 | 5 | 3 | 43 | 47 | 0 | P | 1 | 2 | 10 |
| 1987 San Francisco Giants | 0.217 | 5 | 23 | 0 | 1 | 4 | 5 | 20 | 51 | 0 | P | 1 | 1 | 10 |
| 1988 San Diego Padres | 0.200 | 2 | 10 | 1 | 2 | 5 | 10 | 62 | 102 | 0 | P | 1 | 2 | 21 |
| 1989 San Diego Padres | 0.000 | 0 | 13 | 0 | 0 | 4 | 3 | 70 | 92 | 0 | P | 3 | 0 | 11 |
| 1990 Kansas City Royals | 0 | 0 | 0 | 0 | 2 | 7 | 53 | 73 | 0 | P | 1 | 0 | 6 | |
| 1991 Kansas City Royals | 0 | 0 | 0 | 0 | 6 | 3 | 29 | 47 | 0 | P | 0 | 1 | 7 | |
| 1992 Atlanta Braves | 0.000 | 0 | 1 | 0 | 0 | 1 | 0 | 14 | 15 | 0 | P | 1 | 0 | 0 |
| 1992 Kansas City Royals | 0 | 0 | 0 | 0 | 1 | 3 | 13 | 19 | 0 | P | 0 | 0 | 6 | |
| 1993 Philadelphia Phillies | 0.333 | 1 | 3 | 0 | 0 | 1 | 2 | 25 | 28 | 0 | P | 0 | 0 | 3 |
| 1993 San Diego Padres | 0.000 | 0 | 1 | 0 | 0 | 0 | 3 | 35 | 42 | 0 | P | 2 | 1 | 5 |
| 1994 San Diego Padres | 0 | 0 | 0 | 0 | 0 | 1 | 20 | 15 | 0 | P | 0 | 0 | 3 | |
| 1997 Milwaukee Brewers | 0 | 0 | 0 | 0 | 0 | 0 | 19 | 14 | 0 | P | 0 | 1 | 5 |