What happened: Francisco Cordova and Ricardo Rincon combined on a no-hitter against the Astros at Three Rivers Stadium on July 12, 1997. Cordova worked nine innings before Rincon closed it out in extra innings.

Why it matters: Social media marked the 29th anniversary of the game on Sunday, with fans noting it as one of the few extra-inning combined no-hitters in MLB history. The Astros and Rangers meet Sunday in a series tied 1-1, unrelated to the anniversary.

What to watch: No further action is expected on the anniversary itself.