Stefen Romero, Shawn O'Malley, Jose Ramirez and Tony Zych are the first to get the nod.
With rosters expanding today it was inevitable that the Mariners would call up a few minor leaguers. Sure enough, here they are:
#Mariners recall OF Stefen Romero & Jose Ramirez from AAA Tacoma; select INF Shawn O'Malley & RHP Tony Zych from AAA.
— MarinersPR (@MarinersPR) September 1, 2015
Ramirez and Romero you know, although probably to varying degrees of familiarity. O'Malley and Zych are relative unknowns, coming straight up from Jackson to join the team in Houston.