The Jets announced the injury and said his return was doubtful.
Christian Hackenberg, who played the first half, returned to the game after Petty’s injury. The Jets trailed 29-3 at halftime, with nine first downs and 127 yards as Hackenberg went 8-of-15 for 60 yards with two interceptions that were returned for touchdowns and a 23.6 passer rating.
Petty ignited the offense in the second half, going 15-of-18 for 250 yards with three touchdowns, no interceptions and a perfect 158.3 passer rating. But Petty got his lower leg rolled at the 2-minute warning.
Petty got up slowly and began walking off with a slight limp. He tried to jog to the sideline and couldn’t put weight on his left leg, according to Rich Cimini of ESPN.