Turner spent his first two seasons at LSU, playing in 60 games with 59 starting assignments for the Tigers. He has two more years of eligibility remaining after sitting out the 2012-13 season under NCAA transfer rules.
"Ralston is a young man I've known for quite a while," Gottfried said. "He's a excellent shooter and a very good overall perimeter player. We are very happy to have him join us."
As a freshman, Turner led the Tigers in scoring, averaging 12.3 points per game. Turner earned All-SEC Freshman Team honors despite missing the first five conference games of the season due to injury.