A team has finished a game with 18-15-2 runs-hits-errors line 2 times since 1897, most recently Boston Red Sox on 4 July 1939. That is about one every 221,502 team-games.
Box score for the most recent one ↗
18-13-2 18-13-4 18-14-0 18-14-2 18-14-1 18-15-3 18-15-2 18-15-0 18-15-1 18-16-0 18-16-2 18-16-3 18-16-1
The whole distribution — Runs-Hits-Errors Lines · All 18 shapes