On this date in 1998, Chicago Cubs rookie Kerry Wood tied the major league record with 20 strikeouts. It looked like this:
It may have been the most dominant major league game ever pitched. By Game Score, it's the best in history. He gave up one infield hit and issued no walks (although he did hit one batter, which isn't counted in Game Score). For the quality of his stuff that day, check out curveballs at the 50-second mark to Jeff Bagwell and at 1:25 to strike out Dave Clark.
Astros fans may point out that it was a cloudy, gray afternoon and visibility wasn't great.