A team has finished a game with 3-7-7 runs-hits-errors line 7 times since 1897, most recently Birmingham Black Barons on 18 July 1948. That is about one every 63,286 team-games.
Box score for the most recent one ↗
3-7-0 3-7-4 3-7-8 3-7-9 3-7-6 3-7-10 3-7-7 3-8-0 3-8-1 3-8-6 3-8-2 3-8-3 3-8-5
The whole distribution — Runs-Hits-Errors Lines · All 18 shapes