A team has finished a game with 5-2-1 runs-hits-errors line 6 times since 1897, most recently St. Louis Cardinals on 4 September 2004. That is about one every 73,834 team-games.
Box score for the most recent one ↗
4-21-1 4-22-0 4-24-4 5-1-0 5-1-1 5-2-0 5-2-1 5-2-7 5-2-3 5-2-2 5-3-2 5-3-0 5-3-8
The whole distribution — Runs-Hits-Errors Lines · All 18 shapes