Polk I says yes too. Steve d'Ercole used to come in from his SS position to save game 1 of a 7-inning DH and start game 2, then play SS again for game 3 on Sun. And Brantley and Gene Morgan used to routinely pitch complete 7-inning games in a Sat DH, then split a Wed 9-inning game 5-4, and do it again the next week, and the next, etc.