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Chris O'Donnell, star of CBS' hit drama NCIS: Los Angeles, is in first place after the first weekend of tournament action in the CBSSports.com Celebrity Brackets contest.

O'Donnell, who has Kentucky to win it all, has compiled a 38-10 record with 49 points. Despite losing one of his Final Four teams, he is still in good shape, picking Kentucky, Arizona, Michigan State.

Celebrity Standings
Celebrity Pts Rec. Champion
Chris O'Donnell 49 38-10 Kentucky
Shad Moss 48 35-13 Kentucky
Sharon Osbourne 47 36-12 Wisconsin
Boomer Esiason 46 36-13 Kentucky
Charley Koontz 45 36-12 Kentucky
Julie Chen 45 35-13 Kentucky

Shad Moss, who is better known as rap artist Bow Wow and currently starring on CSI: Cyber, is in second place with 48 points, picking Kentucky to win the championship. Sharon Osbourne, one of the co-hosts of The Talk, is in third place with 47 points, picking Wisconsin to win it all.

Boomer Esiason, who is currently an analyst for CBS' NFL Today and co-hosts the Boomer and Carton Radio Show, is in fourth place with 46 points.

Charley Koontz, who also stars with Shad Moss on CSI: Cyber, is in fifth place with 45 points and has Kentucky beating Duke. Julie Chen, who is host of The Talk and Big Brother, also is in fifth with 45 points and has Kentucky to win it all.

Two other celebrities who are in striking distance and do not have Kentucky to win it all are Brian Dietzen and Lisa Leslie. Dietzen, who stars on NCIS, has 44 points and picked Duke to win the title. Leslie, a former three-time MVP in the WNBA and current co-host of CBS Sports Network's We Need to Talk also has 44 points with Arizona winning the championship.