The announcement came on the same day that junior college wing Juan Patillo signed a national letter of intent with the Sooners, bolstering an already strong signing class.
Neysmith (6-foot-5, 203 pounds) played in 22 of OU's 35 games in 2007-08, starting four times. He averaged 0.5 points and 0.6 rebounds while playing 5.9 minutes a game.
"Tony said he wants to be closer to home," said Capel. "We respect his decision and wish him luck. Hopefully he'll find a place where he'll be happy."
Neysmith came to Oklahoma from Norcross, Ga. He was a three-star player, as ranked by Scout.com.
Patillo will come to Oklahoma via the College of Southern Idaho, where he averaged a team-high 17.4 points in 22.1 minutes a game. His team finished 30-2 on the season.
He added 6.7 rebounds, 1.2 assists and 1.6 steals per contest while shooting .543 from the field, .396 from 3-point range (21-for-53) and .708 from the free throw line.
"The word that comes to mind when I think about Juan is 'explosive,'" said Capel. "He is very athletic and can play multiple positions. At 6-7 and about 218 pounds, he's going to come here with great size already. We anticipate him being a wing player for us.
"He plays really hard, he can shoot it out to about 18 or 19 feet, he can put it on the floor. He can defend multiple positions and is a high-energy guy. The thing that probably stood out the most about his visit last weekend was how he connected and fit in with our returning players. We're very, very excited about Juan." As a freshman in 2006-07, Pattillo averaged 11.9 points, a team-high 7.4 rebounds, 1.6 assists and 1.9 steals while shooting .583 from the field and .655 from the free throw line. CSI finished with a 30-7 record that year.
Pattillo, who is from Las Vegas, Nev., attended Canyon Springs High School.
Pattillo joins four November signees as members of OU's 2008 recruiting class. Also in Norman for the 2008-09 campaign will be current high school senior guards Willie Warren (a McDonald's All-American) and Ray Willis, and junior college big men Orlando Allen and Kyle Cannon. Allen and Cannon will be sophomores in terms of eligibility next season.