Cleveland Cavaliers baller Tristan Thompson is facing a 25-game suspension for violating the league’s NBA/NBPA Anti-Drug Program, RadarOnline.com has learned. The power forward tested positive for banned substances ibutamoren, which increases growth hormone levels and builds muscle, and SARM LGD-4033, known to be a performance enhancer. Today it was announced that Khloé Kardashian’s ex will be sidelined without pay starting Wednesday, when the Cavs face off with the Milwaukee Bucks. Thompson joined the team as a free agent last Sept. “His impact both on and off the court is immeasurable, and h…