The Mets acquired left-hander Oliver Perez and reliever Roberto Hernandez from the Pirates in exchange for outfielder Xavier Nady.
The need to bolster the staff intensified when the Mets lost right-handed setup man Duaner Sanchez for the season to a separated pitching shoulder.
Perez was 2-10 with a 6.63 ERA in 15 starts before being sent down to Triple-A in June. In 2004, he was 12-10 with a 2.99 ERA but hasn’t been the same since.
Nady has a career-high 14 home runs this season since coming over to the Mets from the Padres in an offseason trade.