The Hammer by Egantx7

Question 8

Ironically, the Loma Prieto Earthquake that delayed the 1989 World Series damaged this man's Cy Young Award plaque when it fell off the wall. This four-time All-Star was on the mound on 14 July 1968 when he served up Aaron's 500th home run, only the 8th such home run in history to that point. Identify this then defending Cy Young Award winner who sported a "MR 500" license plate for some time after serving up the historic tater, the only Giant to win the award prior to Tim Lincecum in 2008.

Mike McCormick