A team has finished a game with 20-14-0 runs-hits-errors line 4 times since 1897, most recently Atlanta Braves on 5 October 2001. That is about one every 110,751 team-games.
Box score for the most recent one ↗
19-28-1 19-28-0 20-0-0 20-3-0 20-11-1 20-13-1 20-14-0 20-15-2 20-16-1 20-16-4 20-16-0 20-16-5 20-17-0
The whole distribution — Runs-Hits-Errors Lines · All 18 shapes