On July 31, 1981 — The fifty-day long baseball strike, wiping out a third of the regular season, is settled when the owners and players agree on a pooling system for the compensation of free agents. The All-Star Game will mark the end of baseball’s first-ever midseason work stoppage.

Source:
Baseball Reference July 29
National Pastime
Retro Sheet
Hall of Fame
SABR Games Project
Replay The Game