Cleveland Cavaliers' Anderson Varejao, from Brazil, poses for a photograph during the NBA teams media day Monday, Sept. 30, 2013, in Independence, Ohio. (AP Photo/Tony Dejak)

INDEPENDENCE, Ohio (AP) -- Cavaliers center Andrew Bynum has resumed basketball activities, but will not be medically cleared to practice when Cleveland opens training camp Tuesday.

Bynum, who underwent bilateral arthroscopic surgery on both knees in March, hasn't appeared in an NBA game since May 21, 2012. The 7-footer signed a two-year contract with Cleveland on July 19 after missing all of last season while with Philadelphia.

General manager Chris Grant said Bynum began taking part in full-court drills two weeks ago, but no timetable has been set for his return to full-contact practices.

Bynum joined All-Star point guard Kyrie Irving and new coach Mike Brown as the centers of attention as the Cavaliers held media day at their suburban practice facility.