Mark Sanchez was well on his way to pulling ahead in the New York Jets' quarterback competition. Then came two costly mistakes that overshadowed an otherwise solid performance -- and kept the door open a bit for Geno Smith. Sanchez led the Jets on five scoring drives through three quarters in a 37-13 victory over the Jacksonville Jaguars on Saturday night. But, he also threw an interception in the red zone and then held onto the ball too long on third down as the first half ended, keeping the Jets (1-1) from a chance at a field goal.