 After five season in the Mets' minor league system, he made it to the big league club out of Spring training in .In the second game of the season against the Montreal Expos, Cornejo entered the game in the eighth inning with the Expos leading 5-2, and pitched the final two innings without giving up a run.The Mets, meanwhile, scored two in the eighth and two in the ninth to earn the victory for Cornejo in his Major League debut.