Found some info on 7 hits games as it is poorly tracked if you do it in extras: A host of players have had a 6-for-6 day at the plate, and two have gone 7-for-7 — Cesar Gutierrez of the Tigers (in 12 innings) in 1970 and Rennie Stennett of the Pittsburgh Pirates in 1975, in a dominant nine-inning effort. But we’re still waiting on someone to go 8-for-8 or better. In 2016, the San Francisco Giants’ Brandon Crawford narrowly missed, going 7-for-8 in a 14-inning win over the Marlins, with only a fifth-inning strikeout keeping him from the feat. In 1932, Cleveland Indians shortstop Johnny Burnett was 9-for-11 at the plate in an 18-inning loss to the Philadelphia Athletics. However, the perfect eight-hit day is still out there waiting to be had. Still incredibly rare. So there you go. Johnny Burnett managed 9-11 and his team lost in 18 innings.