A team has finished a game with 15-12-2 runs-hits-errors line 4 times since 1897, most recently Boston Red Sox on 10 June 1948. That is about one every 110,751 team-games.
Box score for the most recent one ↗
15-10-3 15-11-0 15-11-2 15-11-1 15-11-3 15-12-3 15-12-2 15-12-0 15-12-6 15-12-5 15-12-4 15-12-1 15-13-3
The whole distribution — Runs-Hits-Errors Lines · All 18 shapes