Arizona plugs in RB, keeps running
ST. LOUIS — Two running backs down, the Cardinals kept the production sky high.
Rookie David Johnson ran for 99 yards and scored a touchdown in his first career start, helping pave the way for Arizona's decisive over St. Louis. Coach Bruce Arians said the third-round pick from Northern Iowa reminded him of a young Edgerrin James.
"Exactly what I expected," quarterback Carson Palmer said. "He doesn't act like a rookie, he doesn't look like a rookie."
Johnson caught one of Palmer's two touchdown passes as Arizona rolled up 524 yards in its sixth straight win. Fellow fill-in Kerwynn Williams had his first career touchdown on a 35-yard run as the Cardinals remained three games ahead of the Seahawks in the NFC West.
Johnson stepped up after injuries to Chris Johnson and Andre Ellington. He admitted to being nervous — but just the first series.
"After that I started getting more comfortable and seeing the holes opening," Johnson said.