A team has finished a game with 20-20-0 runs-hits-errors line 4 times since 1897, most recently Atlanta Braves on 30 June 2021. That is about one every 110,751 team-games.
Box score for the most recent one ↗
20-19-2 20-19-1 20-19-5 20-20-3 20-20-2 20-20-1 20-20-0 20-21-2 20-21-5 20-21-1 20-21-3 20-21-0 20-22-3
The whole distribution — Runs-Hits-Errors Lines · All 18 shapes