BY JIM THOMAS GLENDALE, ARIZ. -- So much for what happened last week against New Orleans. So much for any November momentum. It all vanished into the desert evening at University of Phoenix Stadium with Arizona's Patrick Peterson twisting and turning 99 yards through the Rams punt coverage team for his third punt return touchdown of the season to defeat the Rams 19-13 in overtime. The Rams couldn't hold a 13-6 led late in the fourth quarter and thus drop to 1-7 on the season. Coach Steve Spagnuolo is now 9-31 in his third season as Rams head coach, and the clock is ticking. A sack by defensive end Chris Long that led to a loss of 16 yards forced Arizona to punt with just under a minute to play. Then, Austin Pettis -- who had trouble even signaling for a fair catch when he started returning punts earlier this season, gave the Rams decent field position at their 36 with a 19-yard return. Pettis then caught a 23-yard pass to advance the ball into Arizona territory at the 41. After a short pass to Pettis, a pass interference call against Arizona, and an 8-yard run by Steven Jackson, Josh Brown lined up for a 42-yard field goal with 4 seconds to play. But 6-foot-8 Arizona defensive end Calais Campbell steamed through to block the kick and force overtime at 13-13. The Rams had taken a 13-6 lead on a pair of third-quarter safeties. The safeties came on back-to-back defensive plays following Donnie Jones punts. On the first, defensive end James Hall split a double team by left tackle Levi Brown and left guard Daryn Colledge to sack John Skelton, who started in place of the injured Kevin Kolb at quarterback. That safety gave St. Louis an 11-6 lead with 7:24 to play. The Rams could do nothing after the Arizona free kick, with Jones punting out of bounds at the Arizona 9. On the Cardinals' first play from scrimmage following the Jones punt, C.J. Ah You ran down Skelton and was in the process of bringing him down to the ground when Skelton frantically tried to throw the ball away. The play was ruled intentional grounding, and since it took place in the end zone, it was another safety. Two safeties, less than 4 minutes apart. It was the first time since Minnesota in 2008 that a team had two safeties in one game. But the 13-6 lead disappeared in one fell swoop when Skelton found Larry Fitzgerald in the back of the end zone for a 13-yard TD to tie the game 13-13 with 4:51 to play. Fitzgerald lined up in the slot on the play and no Rams cornerback picked him up. He ended up having only a linebacker and a safety to beat for the score. The first half was all about field goals, with Brown kicking three to give the Rams a 9-3 halftime lead. Wearing a brace for his high ankle sprain that went halfway up his left calf, Bradford moved around well enough, surviving three first-half sacks and even scrambling once for a couple of yards. Midway through the opening quarter, he nimbly sidestepped the Arizona pass rush, stepped up in the pocket and zipped a 22-yard completion over the middle to Brandon Gibson. The Rams dominated time of possession (20:02 to 9:58) and piled up the yards (189 to 58), but in an all-too-familiar story couldn't get over the hump when they got in scoring territory. They settled for the first Brown field goal, from 48 yards, after rookie outside linebacker Sam Acho got a sack in his third consecutive game by dropping Bradford for a three-yard loss on third-and-4 from the Arizona 27. Midway through the second, the Rams faced a third-and-1 from the Big Red 17, when Arizona safety Adrian Wilson shot through a gap on a run blitz and dropped Jackson for a two-yard loss. The result was a 37-yard Brown field goal and a 6-3 lead. Brown made it 9-3 with a 41-yarder as time expired in the first half. On third-and-2 from the Arizona 20, pressure up the middle from Arizona cornerback Richard Marshall resulted in another sack. Arizona couldn't get much going. A 22-yard punt return by Patrick Peterson became a 37-yard play when Brit Miller was flagged 15 yards for a late hit on Peterson. The Cardinals gained two first downs but had to settled for a 27-yard Jay Feely field goal on what was their first possession of the game. The Cardinals crossed midfield only once the rest of the half, and reached only the St. Louis 48 at that. But Arizona put together its best drive to open the second half marching 58 yards before Feely's 38-yard field goal narrowed the Rams' lead to 9-6 with 10:30 left in the third quarter.