ATLANTA — The Atlanta Hawks have signed undrafted rookie free agent centre Matt Costello of Michigan State.

The 6-foot-9, 245-pound Costello averaged 5.7 points and 5 rebounds on the Hawks' summer league team in Las Vegas.

Costello averaged 10.7 points and 8.2 rebounds as a senior at Michigan State. He holds the school's career record with 146 blocked shots.

Terms of the deal were not released.