No. 4: Mac Jones, New England Patriots
After an impressive rookie season, Mac Jones struggled in his second year. In 14 starts, Jones threw for 2,997 yards, 14 touchdowns and 11 interceptions.
He missed some time due to an ankle sprain, but in those games he missed, rookie fourth-round pick Bailey Zappe was impressive. In four games last season, Zappe threw for 781 yards, five touchdowns and three interceptions.
Jones was benched in Week 7 in favor of Zappe, although the WKU product did not do much better. As a result, Jones was the starter for the rest of the season.
Mac Jones will be the starter again this season, but it is certainly possible the Patriots will give Zappe another look if they do not like what they see from Jones.