Continuity mistake: When Charlie asks Dave how Sue is, Charlie has an oxygen mask on with the elastic around his head, but after Dave tells Charlie that Sue's fine and that Johnny's got her on O2, in the wideshot as Dave walks away the oxygen mask has vanished from around his head.
Continuity mistake: When Johnny tells Sue that Charlie's injury means paid vacation, Johnny is wearing his turnout gear and the coat has long sleeves, but in the closeup when he places the oxygen mask on Sue's face, the arms we see are bare.
Answer: I was rewatching a few first season episodes of Charlie's Angels (1976), and in S1xE6 "The Killing Kind," I recognized the same actor. So, to finally fully answer your question, the two baseball players in School Days are played by Rod Perry and Sean Fallon Walsh.
Super Grover ★