PALO ALTO, Calif. — Senior quarterback Matt Barkley has amassed 29 wins during his Trojan tenure. Much to his dismay, none of those will have come against Stanford.In a night plagued with turnovers and inconsistency, No. 2 USC fell to the Cardinal at Stanford Stadium 21-14. It was the fourth-straight time the Trojans have lost to Stanford, making it the only conference foe Barkley has failed to beat in his career.Matt Barkley went 20 for 41 with two interceptions and no touchdown passes in USC’s 21-14 loss to Stanford at Stanford Stadium. Carlo Acenas | Daily TrojanBarkley threw for 241 yards and a pair of interceptions Saturday and was sacked a season high four times. As a team, the Trojans gained only 280 yards in total offense, due in large part to Stanford’s defensive front.“That’s a great front seven,” USC coach Lane Kiffin said. “They’re even better than last year, giving a lot of people a lot of problems.”The Trojans turned the ball over three times during the game and were unable to sack Stanford quarterback Josh Nunes. While Kiffin gave credit to the Cardinal, he was emphatic in saying a lot of the damage was self-inflicted.“If you turn the ball over like we did … we were fortunate to be ahead seven at the half,” Kiffin said. “We didn’t play with a lot of discipline today.”Things didn’t bode well from the opening kickoff for the Trojans, as Stanford receiver Ty Montgomery ran it back 64 yards. The Trojan defense held, however, and forced the Cardinal into a 47-yard field goal try that was ultimately missed by Jordan Williamson.With about 11 minutes left in the first quarter, Barkley hit freshman receiver Nelson Agholor on a 49-yard pass as he was being pressured. Redd then drove it into the end zone for the game’s first points.As was the theme Saturday, though, Stanford had an answer. Stanford running back Stepfan Taylor broke away for a 59-yard touchdown run in the first quarter and finished the night with 153 yards rushing. With a minute left in the first, the Trojans went for it on fourth-and-two and converted on a pass to sophomore tight end Randall Telfer. Redd later took it in for his second score of the day on a two-yard toss play with 11 minutes in the half.After Stanford missed another field goal, Barkley was intercepted with a little more than a minute remaining in the half. Sophomore linebacker Dion Bailey returned the favor on the very next play, though, intercepting Nunes. It was his third interception of the season.Barkley gave the Cardinal defense another gift, however, and was intercepted on the next play on what looked like an overthrow to Lee. USC’s offense never looked in sync, even later in the game.“I thought we’d come up in the second half, up by seven … I thought we’d come out and start rolling,” Kiffin said. “Unfortunately, we didn’t.”The strong second half Kiffin was hoping for never came, as a personal foul led to a fourth-and-17 punt. Taylor took a screen pass to the end zone at the end of the third quarter to knot the game at 14 heading into the final quarter. The Cardinal then took a 21-14 lead on a 37-yard touchdown pass to tight end Zach Ertz.“I thought [Nunes] played great today,” Kiffin said. “He settled down and really made some big throws and [had] the two big runs … he looked like a veteran out there.”Saturday’s loss is a major blow to the Trojans, who have their eyes set on a BCS title run. Despite the loss, Kiffin doesn’t believe USC’s season is ruined.“It isn’t the end of the world,” Kiffin said. “We’ll get back on the plane, go back to work and get better and get ready for a home conference game next week.”The Trojans face California on Saturday at 3 p.m. The game will be available on the Pac-12 Network.