It was May 30, 1922 and the Cardinals and Cubs were playing a doubleheader. Cardinals General Manager Branch Rickey traded Cliff Heathcote to the Cubs in exchange for Max Flack.
The two players met in the hallway between games and switched uniforms for the second contest.
How it Happened
The Cubs and Cardinals were in the middle of a morning-day doubleheader (back then, the first games of a double dip started before noon) at Cubs Park. Max Flack, who lived three blocks from the ballpark, went home for lunch between games and arrived back to the Cubs clubhouse to find out he’d been traded.
Flack was now a Cardinal, swapped for outfielder Cliff Heathcote. The two did what any similarly-built men would do (Flack was 5-foot-7, 150 pounds; Heathcote, 5-10, 160): they traded uniforms and hit the field with their new teams.