“ Randy Johnson made his MLB debut on September 15, 1988, for the Montreal Expos against the Pittsburgh Pirates. The 6'10" rookie left-hander started, earned his first win by pitching five innings, allowed two runs, and struck out five batters, helping the Expos win 9–4. Wikipedia +2 Key Details of Randy Johnson's Debut: Date: September 15, 1988 Team: Montreal Expos Opponent: Pittsburgh Pirates Result: Earned his first career win Performance: 5 innings pitched, 2 runs allowed, 5 strikeouts First Strikeout Victim: Orestes Destrade in the second inning Game Outcome: Montreal won 9–4 Wikipedia +2