Mark Williamson

Pitcher · Career Stats, Bio & Records (1987-1994)

W–L 46–35
ERA 3.86
WHIP 1.34
SO 397
Pitcher PIV 1777.9
Position
Pitcher
Bats / Throws
R / R
Height / Weight
6'0" / 155 lb
Born
7/21/1959 in Corpus Christi, TX, USA
MLB Debut
1987-04-08
Last Game
1994-08-04

Full name: Mark Alan Williamson

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Career Pitching Statistics

W L G GS CG SHO SV IP H ER HR BB SO ERA Pitcher PIV
46 35 365 15 2 0 21 689.7 701 296 62 226 397 3.86 1777.9

Career ERA 3.86 vs. league average 3.98 across their career seasons — near league average.

Season-by-Season Pitching

Pitching Career Arc

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
1987 BAL AL 8 9 61 2 0 0 3 125.0 122 56 41 73 4.03 4.29 (+6%) 918.3
1988 BAL AL 5 8 37 10 2 0 2 117.7 125 64 40 69 4.90 3.73 (-31%) -1412.3
1989 BAL AL 10 5 65 0 0 0 9 107.3 105 35 30 55 2.93 3.71 (+21%) 1627.6
1990 BAL AL 8 2 49 0 0 0 1 85.3 65 21 28 60 2.21 3.86 (+43%) 556.0
1991 BAL AL 5 5 65 0 0 0 4 80.3 87 40 35 53 4.48 3.91 (-15%) -780.2
1992 BAL AL 0 0 12 0 0 0 1 18.7 16 2 10 14 0.96 3.75 (+74%) 74.4
1993 BAL AL 7 5 48 1 0 0 0 88.0 106 48 25 45 4.91 4.19 (-17%) 1420.2
1994 BAL AL 3 1 28 2 0 0 1 67.3 75 30 17 28 4.01 4.51 (+11%) -626.0
Career · 8 seasons 46 35 365 15 2 0 21 689.2 701 296 226 397 3.86 — 1,778

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
365 0 0 0 0 0 0 0 0 0 0 .000 .000 .000 .000 0

Season-by-Season Batting

Career Arc

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
1987 BAL AL 61 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
1988 BAL AL 37 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
1989 BAL AL 65 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
1990 BAL AL 49 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
1991 BAL AL 65 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
1992 BAL AL 12 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
1993 BAL AL 48 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
1994 BAL AL 28 0 0 0 0 0 0 0 0 0 0 .000 — — — — 0.0
Career · 8 seasons 365 0 0 0 0 0 0 0 0 0 0 — — — — — 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 (730 games) →

Per-game data from Retrosheet (regular season, through 2025).

Batting — Home / Away

SplitGABRHHRRBIAVG
Home18400000—
Away18100000—

Pitching — Home / Away

SplitGIPHERBBSOERA
Home184356.23291261021823.18
Away181333.03721701242154.59

Last 10 Games — Pitching

DateTmOppDecIPHRERBBSOHR
1994-08-04 BALMIL L 6.2944121
1994-07-30 BALTOR — 5.1733112
1994-07-26 BALCLE — 3.2322120
1994-07-23 BALOAK — 4.0200130
1994-07-18 BALSEA — 1.2211000
1994-07-09 BALOAK — 3.0400010
1994-07-03 BALLAA W 5.0311011
1994-06-30 BALCLE — 0.0211001
1994-06-28 BALCLE — 2.1422010
1994-06-22 BALMIL — 6.1511130

Fielding Statistics

Career Fielding Totals by Position

Position G GS PO A E DP
P 365 15 75 76 7 4

Season-by-Season Fielding

Year Team Pos G GS PO A E DP
1987 BAL P 61 2 20 17 2 1
1988 BAL P 37 10 9 14 1 0
1989 BAL P 65 0 9 10 0 1
1990 BAL P 49 0 14 13 2 2
1991 BAL P 65 0 7 9 2 0
1992 BAL P 12 0 1 0 0 0
1993 BAL P 48 1 8 10 0 0
1994 BAL P 28 2 7 3 0 0

Career Games by Position

Position Diamond

Circle size = games played at each position.

Position Games
Pitcher 365

Salary History

Year Team League Salary
1994 BAL AL $350,000
1993 BAL AL $500,000
1992 BAL AL $900,000
1991 BAL AL $685,000
1990 BAL AL $275,000
1989 BAL AL $120,000
1988 BAL AL $85,000
1987 BAL AL $62,500
Total Career Earnings $2,977,500

College History

School Name City State Years Attended
Grossmont College El Cajon CA 1979, 1980
San Diego State University San Diego CA 1981, 1982

Most Similar Players

Career comps based on counting + rate stats and primary position. Score is relative — closest peer anchors at ~98%.

Career Spans

Mark Williamson (highlighted) compared to peers across the same era.

  1. 98
    Chuck Crim
    47-43, 3.83 ERA
  2. 95
    Keith Atherton
    33-41, 3.99 ERA
  3. 93
    Ricky Horton
    32-27, 3.76 ERA
  4. 92
    Les Lancaster
    41-28, 4.05 ERA
  5. 92
    Roy Lee Jackson
    28-34, 3.77 ERA
  6. 91
    Tom Gorman
    36-36, 3.77 ERA

Frequently Asked Questions about Mark Williamson

What years did Mark Williamson play?
Mark Williamson played in Major League Baseball from 1987 to 1994.
Was Mark Williamson a pitcher?
Yes. Mark Williamson pitched in the major leagues, recording 46 wins and 397 strikeouts.