A team has finished a game with 13-12-2 runs-hits-errors line 29 times since 1897, most recently St. Louis Cardinals on 30 July 2011. That is about one every 15,276 team-games.
Box score for the most recent one ↗
13-11-2 13-11-0 13-11-5 13-11-4 13-12-3 13-12-4 13-12-2 13-12-1 13-12-6 13-12-0 13-13-5 13-13-2 13-13-0
The whole distribution — Runs-Hits-Errors Lines · All 18 shapes