SAN FRANCISCO — Southern California tailback Joe McKnight has rejoined the Trojans for practice after missing their early preparations for the Emerald Bowl.

McKnight still hasn’t been cleared by the school to play against Boston College on Saturday night. USC is investigating his use of an SUV that doesn’t belong to him.
McKnight practiced with the Trojans in Los Angeles on Monday, but stayed home to deal with compliance issues when the Trojans traveled to San Francisco. Coach Pete Carroll says he arrived in the Bay Area on Wednesday night.
McKnight is USC’s first 1,000-yard rusher since 2005.