Head coach Paul Johnson said Shaw is expected to miss six to eight weeks. Johnson said it was too early to speculate on the possibility that Shaw could miss the season as a redshirt after playing as a true freshman in 2008.
Shaw was expected to again play behind starter Josh Nesbitt after seeing substantial playing time, including one start, last season. Shaw was 9-of-14 passing for 230 yards while starting in a 27-0 win over Duke. He also played most of the game in a 38-7 win over Mississippi State.
"It's really unfortunate," Johnson said of the injury. "Jaybo was playing really well and was having a good camp."
Shaw made a quick adjustment to Johnson's spread option offense after playing in a similar formation at Flowery Branch (Ga.) High School near Atlanta.
He had a touchdown run early in the scrimmage and then was injured when a teammate fell on him after a routine pass completion.
Sophomore Tevin Washington is expected to move up as Nesbitt's top backup. Freshmen David Sims and Jordan Luallen, who has missed a week with an ankle injury, are behind Nesbitt and Washington on the depth chart.