TE Jermaine Gresham celebrates his touchdown

QB Drew Stanton scrambles before throwing a touchdown pass

An aeriel view of Levi's Stadium

WR John Brown catches a long pass

Cardinals fans at the game

Cardinals fans with a sign for Patrick Peterson

WR Larry Fitzgerald congratulates WR Jaron Brown on his touchdown reception

Backup QB Blaine Gabbert

TE Jermaine Gresham

RB Adrian Peterson

QB Drew Stanton

WR Jaron Brown catches a touchdown pass

WR Jaron Brown's touchdown reception

49ers QB Jimmy Garoppolo

WR J.J. Nelson catches a pass

DL Olsen Pierre brings down 49ers QB C.J. Beathard

DL Corey Peters with the sack

DL Olsen Pierre and LB Haason Reddick combine for the sack

TE Jermaine Gresham with a touchdown reception

S Tyrann Mathieu before the game

QB Carson Palmer (left) talks with Drew Stanton on the sideline

RB Adrian Peterson

QB Drew Stanton

RB Adrian Peterson shakes off a tackler

WR John Brown

Cardinals RB Adrian Peterson on the carry

Cardinals head coach Bruce Arians looks over play calls

RB Adrian Peterson looks for running room

Cardinals S Tyrann Mathieu (right) pressures 49ers QB C.J. Beathard (left)

TE Jermaine Gresham celebrates a touchdown reception

LB Karlos Dansby (right) celebrates his late interception with teammate Deone Bucannon (left)

RB Adrian Peterson

Cardinals head coach gives his quarterback Drew Stanton a high five on the sideline after a touchdown

RB Adrian Peterson breaks free for extra yardage

San Francisco QB C.J. Beathard

RB Adrian Peterson bursts up the middle

K Phil Dawson (right) celebrates a made field goal with holder Andy Lee (left)

QB Drew Stanton

49ers QB C.J. Beathard scrambles out of the pocket

Cardinals RB Adrian Peterson in stride

WR Jaron Brown hauls in a touchdown catch to put the Cardinals up 7-0

RB Adrian Peterson on the carry

Cardinals QB Drew Stanton looks for a receiver down the field

The 49ers defense collapse on Cardinals RB Adrian Peterson

Cardinals TE Troy Niklas with a catch

The 49ers defense attempts to take down Cardinals RB Adrian Peterson

Cardinals WR Larry Fitzgerald (left) celebrates with LB Karlos Dansby (right)

RB Adrian Peterson breaks free

LB Karlos Dansby celebrates an interception

Cardinals QB Drew Stanton (left) meets up with new 49ers QB Jimmy Garoppolo (right) after the game

Cardinals head coach Bruce Arians (left) greets 49ers head coach Kyle Shanahan (right) after the game