A team has finished a game with 20-21-0 runs-hits-errors line 2 times since 1897, most recently California Angels on 29 June 1995. That is about one every 221,502 team-games.
Box score for the most recent one ↗
20-20-1 20-20-0 20-21-2 20-21-5 20-21-1 20-21-3 20-21-0 20-22-3 20-22-2 20-22-1 20-22-4 20-22-0 20-23-4
The whole distribution — Runs-Hits-Errors Lines · All 18 shapes