The Tigers announced the signing of Newton on Thursday night.
Newton, from Atlanta, was kicked off the Florida team last year after he was arrested and charged with stealing another student's laptop. The charges were dropped earlier this month after he completed a pretrial intervention program for first-time offenders that typically includes probation.
Newton had been considering Miss. State. Bulldog head coach Dan Mullen was his position coach at Florida.
This season, he played at Blinn College in Texas and led the team to a junior college national championship.
With this year's starter Chris Todd out of eligibility, the Tigers are expected to give Newton every opportunity to win the starting job next season.