Eric Griffin’s contract with the Dallas Mavericks is a three-year, non-guaranteed deal, league sources told RealGM.

The Mavericks announced the free agent signing of Griffin on Friday.

Griffin is averaging 9.8 points, 2.8 rebounds and two blocks for the Mavericks’ summer league team this month, and he’s a high-level athlete and an increasingly skilled forward. At 6-foot-8, Griffin had arguably the best dunk of summer league: a one-handed slam over Shane Larkin.

Griffin had gone to training camp with the Miami Heat last season and was a final roster cut. He then played in Puerto Rico and Venezuela.

Griffin, 24, averaged 15.7 points and 8.7 rebounds in his senior season at Campbell University.