A team has finished a game with 5-20-1 runs-hits-errors line 3 times since 1897, most recently Cleveland Guardians on 11 April 1992. That is about one every 147,668 team-games.
Box score for the most recent one ↗
5-19-4 5-19-2 5-19-3 5-19-1 5-19-0 5-20-3 5-20-1 5-20-2 5-20-0 5-21-5 5-21-0 5-21-2 5-22-4
The whole distribution — Runs-Hits-Errors Lines · All 18 shapes