A team has finished a game with 7-6-3 runs-hits-errors line 21 times since 1897, most recently Chicago Cubs on 4 May 2021. That is about one every 21,095 team-games.
Box score for the most recent one ↗
7-5-2 7-5-3 7-5-1 7-5-4 7-5-5 7-6-1 7-6-3 7-6-4 7-6-2 7-6-5 7-6-7 7-6-0 7-7-3
The whole distribution — Runs-Hits-Errors Lines · All 18 shapes