South Carolina facing QB questions again
Shaw, whom Steve Spurrier has praised as the best quarterback in school history, took over for good early in the 2011 season and finished with a 27-5 mark as a starter.
Onetime walk-on Perry Orth and freshman Lorenzo Nunez also started a year ago, managing a turbulent season in which Spurrier resigned midseason and the Gamecocks finished 3-9.
The Gamecocks start the year with two SEC road games, at Vanderbilt and at Mississippi State, so Muschamp does not want an unsettled situation behind center.
Orth, a fifth-year senior, once worked in a Publix grocery store to pay for college before getting a scholarship last season.
Orth's best showing came in the season's final game, when he threw three touchdown passes in a closer-than-expected 37-32 loss to No. 1 Clemson.
Bentley, whose brother Chas Dodd was Rutgers' starting quarterback, had an offer from Alabama but chose to follow his father, Gamecocks running back coach Bobby Bentley, to South Carolina.