A team has finished a game with 3-6-6 runs-hits-errors line 7 times since 1897, most recently Chicago American Giants on 9 June 1947. That is about one every 63,286 team-games.
Box score for the most recent one ↗
3-6-2 3-6-3 3-6-4 3-6-7 3-6-8 3-6-9 3-6-6 3-7-1 3-7-3 3-7-2 3-7-5 3-7-0 3-7-4
The whole distribution — Runs-Hits-Errors Lines · All 18 shapes