In a 3 – 0 Chicago win over the host Reds, Cubs player-manager Frank Chance leaves the game suffering from a blood clot in the brain. Except for 11 brief appearances at 1B over the next three years, his playing days are over.

On july 1, 1911 In a 3 – 0 Chicago win over the host Reds, Cubs player-manager Frank Chance leaves the game suffering from a blood clot in the brain. Except for 11 brief appearances at 1B over the next three years, his playing days are over.

Source
Baseball Reference July 1