A team has finished a game with 12-10-2 runs-hits-errors line 19 times since 1897, most recently Chicago Cubs on 18 July 2007. That is about one every 23,316 team-games.
Box score for the most recent one ↗
12-9-1 12-9-4 12-10-5 12-10-3 12-10-0 12-10-4 12-10-2 12-10-1 12-11-5 12-11-0 12-11-1 12-11-3 12-11-4
The whole distribution — Runs-Hits-Errors Lines · All 18 shapes