Yankees’ Dellin Betances unsure when he can pitch off a mound

by Felix Pantaleón

BALTIMORE — Luis Severino and Dellin Betances played catch on flat ground before the Yankees’ 9-4 win over the Orioles on Tuesday night at Camden Yards. While Severino might be throwing off a bullpen mound Friday in Toronto, Betances didn’t know when he would take the next step in his comeback from upper arm troubles…