A team has finished a game with 12-20-6 runs-hits-errors line 2 times since 1897, most recently Boston Red Sox on 5 September 1927. That is about one every 221,502 team-games.
Box score for the most recent one ↗
12-19-2 12-19-4 12-20-2 12-20-4 12-20-0 12-20-3 12-20-6 12-20-1 12-20-5 12-21-0 12-21-5 12-21-6 12-21-2
The whole distribution — Runs-Hits-Errors Lines · All 18 shapes