Jets defensive end Jermaine Johnson was carted off the field with an Achilles injury during the second half of New York’s Week 2 matchup against the Tennessee Titans on Sunday. Johnson appeared to collapse onto the turf after coming off a block away from the football. His leg buckled and he began favoring his knee as athletic training staff members began tending to him. A cart was then brought off as Johnson’s teammates consoled him before taking him to the locker room. The former Georgia and Florida State star finished the game with two tackles and a tackle for loss. The post Jermaine Johnson…