A team has finished a game with 12-9-2 runs-hits-errors line 11 times since 1897, most recently Boston Red Sox on 12 August 2001. That is about one every 40,273 team-games.
Box score for the most recent one ↗
12-8-8 12-8-3 12-8-0 12-8-1 12-8-2 12-9-3 12-9-2 12-9-0 12-9-1 12-9-4 12-10-5 12-10-3 12-10-0
The whole distribution — Runs-Hits-Errors Lines · All 18 shapes