A team has finished a game with 12-21-3 runs-hits-errors line 1 time since 1897, most recently Chicago Cubs on 5 May 1976. That is about one every 443,004 team-games.
Box score for the most recent one ↗
12-20-5 12-21-0 12-21-5 12-21-6 12-21-2 12-21-1 12-21-3 12-22-3 12-22-2 12-22-0 12-22-1 12-23-4 12-23-0
The whole distribution — Runs-Hits-Errors Lines · All 18 shapes