Oklahoma City, OK -- (Sports Network) - The Oklahoma City Thunder signed three players on Saturday, among them the third overall draft pick James Harden. The team also signed center Byron Mullens and forward Serge Ibaka to contracts. Financial terms of all the deals weren't disclosed.

Harden is coming off a sophomore season in which he averaged a Pac-10-best 20.1 points per game to go with 5.6 rebounds and 4.2 assists at Arizona State. The 6-foot-5 Harden was also named Pac-10 Player of the Year after garnering first-team All Pac-10 honors as a freshman.

Mullens, a center, mostly came off the bench for Ohio State last season, averaging 20.3 minutes with two starts, appearing in all 33 games while posting 8.8 points and 4.7 rebounds per game.

Ibaka, selected by Oklahoma City in the first round of the 2008 NBA Draft (24th overall), spent this past season playing for Ricoh Manresa of the Spanish ACB League. He averaged 7.1 points, 4.5 rebounds.