I do recall the Dodgers of that era occasionally using Don Drysdale as a PH.
Drysdale was the best hitting pitcher of his era. I remember the year he hit 7 home runs and in a critical game the manager put Drysdale in as a PH. He got the hit of course. Glory Days for me as a young female teenager in LA.
Yes, Don Drysdale was a good hitting pitcher. He hit over .300 in some seasons, if I recall correctly.
For whatever reason, the way baseball evolved, nobody cared if pitchers could hit or not. Position players in baseball don’t make it to the majors if they can’t hit. But pitchers have always been held to a different standard.