San Francisco ? Matt Barkley threw touchdown passes to Stanley Havili on Southern California’s first two possessions and added a touchdown run in the fourth quarter to help the Trojans beat Boston College, 24-13, in the Emerald Bowl on Saturday.

The victory was far from impressive, but it did put a positive ending on a disappointing season for USC (9-4). The Trojans lost three of their final five regular-season games to fall out of the national rankings for the first time since Pete Carroll’s first season as coach in 2001.

That left USC in an unfamiliar bowl setting after making it to the Bowl Championship Series the past seven years, including four straight Rose Bowl bids. But the Trojans made the most of it, handing Boston College (8-5) its second straight bowl loss after an eight-year bowl winning streak.

Damian Williams caught 12 passes for 189 yards in what could be his final game for the Trojans, grabbing long passes to set up Havili’s second score and Barkley’s one-yard sneak that gave USC a 24-13 lead with 11:53 remaining. Williams is expected to skip his senior season to enter the NFL Draft.

The Eagles stayed close with the Trojans for most of the game before Dave Shinskie threw an interception to Shareece Wright early in the fourth quarter. On the next play, Barkley connected on a 48-yard pass to Williams, who made a leaping grab between three defenders. Barkley scored on the next play.

The Trojans won despite playing without leading rusher Joe McKnight, who was not cleared to play as the school investigates whether he violated rules by using an SUV that doesn’t belong to him. McKnight is USC’s first 1,000-yard rusher since 2005, with 1,014 yards on 6.2 yards per carry and eight touchdowns.

USC struggled on the ground without McKnight, but was able to move the ball consistently through the air. Barkley completed 27 of 37 passes for 350 yards in the second 300-yard game of his freshman season.