A team has finished a game with 12-6-6 runs-hits-errors line 1 time since 1897, most recently Washington Senators on 30 April 1901. That is about one every 443,004 team-games.
Box score for the most recent one ↗
11-23-0 11-27-3 12-1-0 12-2-0 12-3-0 12-4-0 12-6-6 12-7-2 12-7-0 12-7-1 12-8-8 12-8-3 12-8-0
The whole distribution — Runs-Hits-Errors Lines · All 18 shapes