Offensive coordinator Mike Martz helped his new team the San Francisco 49ers beat his former team, the Detroit Lions, 31-13 on Sunday.

It was over when…
Arnaz Battle recovered an onside kick with just over 6 minutes remaining and the 49ers holding a 15-point lead. Joe Nedney kicked a field goal with 4:25 left to take a three-score lead.
Game ball
Frank Gore rushed for 130 yards and a touchdown. His 27 attempts helped the 49ers control the clock in the second half, and his 33-yard run in the first quarter helped set up the 49ers’ first score.

Key stat
J.T. O’Sullivan was not sacked in 23 pass attempts, an almost unheard of streak in a Mike Martz offense.

Noteworthy
The 49ers are 2-1 for the second consecutive year. … Rudi Johnson rushed for 83 yards and caught a 34-yard touchdown pass for the Lions after replacing rookie rookie Kevin Smith. … Quarterback Jon Kitna was shaken up toward the end of the game and had his right knee examined by the training staff.

The 49ers’ offense is starting to click. QB J.T. O’Sullivan was sharp, throwing for 189 yards and two touchdowns on 16 of 23 passing. Frank Gore was outstanding as well, rushing for 130 yards and touchdown. As long as the defense can hold its own, the 49ers can definitely compete in a weak NFC West, although it’s still hard to fathom that a J.T. O’Sullivan-quarterbacked team will make the playoffs.

New week, same results for the Lions. They got down early, Jon Kitna had zero time to throw and the defense was bad. Outside of Calvin Johnson, Roy Williams, Ernie Sims, Kevin Smith, Dewayne White and maybe Kitna, the entire roster should be blown up.