Montero gave up one hit and two walks while striking out two in 2.2 scoreless innings of relief during Friday's loss to the Marlins.
The Mets' bullpen has been under a lot of strain through the first week of the season, so Montero's efforts Friday allowed his staff-mates to get some needed rest. Until he finds better control, though, it's hard to see the 26-year-old moving into a high-leverage role.