A team has finished a game with 12-7-1 runs-hits-errors line 4 times since 1897, most recently New York Mets on 1 August 1987. That is about one every 110,751 team-games.
Box score for the most recent one ↗
12-2-0 12-3-0 12-4-0 12-6-6 12-7-2 12-7-0 12-7-1 12-8-8 12-8-3 12-8-0 12-8-1 12-8-2 12-9-3
The whole distribution — Runs-Hits-Errors Lines · All 18 shapes