USC’s reeling basketball team suffered a huge setback Sunday, announcing that star guard Chad Baker-Mazara was no longer a member of the program. The departure of the team’s top remaining scorer means that the final image of Baker-Mazara in a Trojans uniform will be him limping through the handshake line Saturday after going down with an apparent leg injury in the second half of a loss to No. 12 Nebraska. Coach Eric Musselman would not specify the nature or severity of Baker-Mazara’s injury