Yup he choked so hard he ended up with his lowest final round score in a major in his career, and his lowest overall score in a major in his career.
Choking isn't based on how you perform the entire round. Come on man
OK.....he finished with a birdie on 18, was six under on the back nine when he was +2 on the back nine combined in the first three rounds....how did he choke? He bogeyed one hole on the back nine.
Screwing up when it's on the line is the very definition of choking. By your standard Tony Romo is the GOAT QB