October 16, 1988 -
Orel Hirshiser is the first MLB pitcher to pitch a shutout game in a playoff series game
and a World Series game in the same postseason.
"Hershiser put together one of the best single seasons in pitching history in 1988. That year, he led the league in wins (23), innings (267), and complete games (15). He finished the season with a record 59 consecutive scoreless innings pitched, breaking the mark held by Dodger great Don Drysdale. He also won his first Gold Glove. He was unanimously selected as the Cy Young Award winner, with a record of 23–8 and a 2.26 ERA.
In the 1988 National League Championship Series between Hershiser's Dodgers and the New York Mets, Hershiser not only started Games 1 and 3, but recorded the final out in Game 4 in relief for a save. He then pitched a complete game shutout in Game 7. He was selected MVP of the series.
Hershiser then capped his historic season in the World Series by pitching a complete game shutout in Game 2 and allowing two runs in a complete game in the clinching victory in Game 5, winning the World Series MVP Award.
Hershiser is the only player to receive the Cy Young award, the Championship Series MVP award, and the World Series MVP award in the same season."
Source: Wikipedia