Chargers.com The Chargers clinched their second straight AFC West title and third in four years Sunday with a 51-14 win over the Detroit Lions at Qualcomm Stadium. The Bolts scored on all five first-half offensive possessions and an 18-yard interception return by outside linebacker Shaun Phillips to take a 34-7 halftime lead in a game played before 66,505 fans. Running back LaDainian Tomlinson reached the end zone first on the Bolts' opening drive with a 6-yard run and added a 2-yard touchdown run early in the second quarter for a 17-0 lead. The Chargers followed both of Tomlinson's touchdowns with 22-yard field goals by Nate Kaeding in the first and second quarters. Phillips' interception return came while rushing the quarterback and tipping the ball to himself for a 27-0 lead. San Diego's fourth first-half touchdown was a 1-yard catch by tight end Brandon Manumaleuna with 27 seconds remaining before halftime. Tomlinson didn't play in the second half, finishing the game with 15 carries for 116 yards and two touchdown runs. Quarterback Philip Rivers left the game after the first series of the second half when the Chargers scored on a 1-yard run by Darren Sproles for a 41-7 lead with 8:35 remaining in the third quarter. For the game, Rivers completed 14-of-21 passes for 142 yards and one touchdown without an interception. Sproles added a fourth-quarter 11-yard touchdown run to finish the game with 25 carries for 122 yards and two scores. It marked the first time the Chargers have had two 100-yard rushers in one game. Kaeding added a third field goal from 45 yards for a 44-7 lead with 5:52 left in the third period. Phillips' interception was one of five by the Chargers. Safety Clinton Hart picked off a pass in the first quarter and inside linebacker Matt Wilhelm in the second period. In the fourth quarter, cornerback Antonio Cromartie intercepted his NFL-leading 10th pass of the year. Inside linebacker Stephen Cooper also had a fourth-quarter theft. The AFC West title clinched at least one home playoff game for the Bolts. The Chargers finish the regular season against the Denver Broncos Dec. 24 at home and Dec. 30 at the Oakland Raiders.