Detroit Lions defensive end Kyle Vanden Bosch, left, knocks the ball away from San Francisco 49ers quarterback Alex Smith (11) and recovers during the first quarter of an NFL football game in Detroit, on Sunday, Oct. 16, 2011. (AP Photo/Carlos Osorio)

Detroit Lions quarterback Matthew Stafford (9) warms up before an NFL football game against the San Francisco 49ers in Detroit, on Sunday, Oct. 16, 2011. (AP Photo/Carlos Osorio)

San Francisco 49ers quarterback Alex Smith (11) warms up before an NFL football game against the Detroit Lions on Sunday, Oct. 16, 2011, in Detroit. (AP Photo/Duane Burleson)

Detroit Lions quarterback Matthew Stafford (9) is chased by San Francisco 49ers linebacker Aldon Smith (99) during the first quarter of an NFL football game in Detroit, on Sunday, Oct. 16, 2011. (AP Photo/Carlos Osorio)

Detroit Lions running back Jahvid Best (44) is stopped San Francisco 49ers defensive end Justin Smith (94) during the first quarter of an NFL football game in Detroit, on Sunday, Oct. 16, 2011. (AP Photo/Carlos Osorio)

Detroit Lions defensive end Kyle Vanden Bosch, left, strips the ball away from San Francisco 49ers quarterback Alex Smith (11) during the first quarter of an NFL football game in Detroit, on Sunday, Oct. 16, 2011. (AP Photo/Rick Osentoski)

Oct 16, 2011; Detroit, OH, USA; Detroit Lions offensive tackle Corey Hilliard (78) and wide receiver Rashied Davis (82) during player introductions prior to the game against the San Francisco 49ers at Ford Field. Mandatory Credit: Andrew Weber- US PRESSWIRE

Detroit Lions tight end Brandon Pettigrew (87) catches a touchdown pass as San Francisco 49ers inside linebacker Patrick Willis (52) defends in the first quarter of an NFL football game in Detroit, Sunday, Oct. 16, 2011. (AP Photo/Rick Osentoski)

San Francisco 49ers quarterback Alex Smith (11) passes the ball in the second quarter of an NFL football game against the Detroit Lions in Detroit, Sunday, Oct. 16, 2011. (AP Photo/Rick Osentoski)

San Francisco 49ers assistant head coach Brad Seely, center, shouts at head linesman Dana McKenzie, left, after the officials conferred and ruled Detroit Lions tight end Brandon Pettigrew had scored a touchdown in the first quarter of an NFL football game on Sunday, Oct. 16, 2011, in Detroit. An official had originally ruled it was not a touchdown. (AP Photo/Duane Burleson)

Detroit Lions quarterback Matthew Stafford (9) is tackled for a safety in the second quarter of an NFL football game against the San Francisco 49ers in Detroit, Sunday, Oct. 16, 2011. (AP Photo/Rick Osentoski)

Detroit Lions kicker Jason Hanson (4) reacts after missing a field goal during the second quarter of an NFL football game against the San Francisco 49ers in Detroit, Sunday, Oct. 16, 2011. (AP Photo/Carlos Osorio)

Detroit Lions quarterback Matthew Stafford (9) talks back to referee Mike Carey (94) after a safety during the second quarter of an NFL football game against the San Francisco 49ers in Detroit, Sunday, Oct. 16, 2011. (AP Photo/Carlos Osorio)

San Francisco 49ers running back Frank Gore (21) celebrates his second-quarter touchdown with quarterback Alex Smith (11) in an NFL football game against the Detroit Lions, Sunday, Oct. 16, 2011, in Detroit. (AP Photo/Duane Burleson)

San Francisco 49ers quarterback Alex Smith (11) pulls away from Detroit Lions defensive tackle Nick Fairley (98) during the second quarter of an NFL football game in Detroit, Sunday, Oct. 16, 2011. (AP Photo/Carlos Osorio)

Detroit Lions quarterback Matthew Stafford (9) passes the ball as San Francisco 49ers defensive end Justin Smith (94) rushes in the second quarter of an NFL football game in Detroit, Sunday, Oct. 16, 2011. (AP Photo/Rick Osentoski)

San Francisco 49ers wide receiver Michael Crabtree (15) loses control of the ball defended by Detroit Lions cornerback Chris Houston (23) during the second quarter of an NFL football game in Detroit, Sunday, Oct. 16, 2011. (AP Photo/Carlos Osorio)

Oct 16, 2011; Detroit, OH, USA; San Francisco 49ers tight end Delanie Walker (46) celebrates after scoring a touchdown in the fourth quarter against the Detroit Lions at Ford Field. Mandatory Credit: Andrew Weber- US PRESSWIRE

San Francisco 49ers tight end Delanie Walker (46) makes a touchdown reception as Detroit Lions free safety Louis Delmas defends in the fourth quarter an NFL football game in Detroit, Sunday, Oct. 16, 2011. San Francisco won 25-19. (AP Photo/Rick Osentoski)

San Francisco 49ers tight end Delanie Walker (46) celebrates his fourth-quarter touchdown with wide receiver Michael Crabtree (15) to take the lead in an NFL football game against the Detroit Lions, Sunday, Oct. 16, 2011, in Detroit. The 49ers defeated the Lions 25-19. (AP Photo/Duane Burleson)

San Francisco 49ers head coach Jim Harbaugh signals a touchdown after watching the stadium television replay Delanie Walker's touchdown in the fourth quarter of an NFL football game against the Detroit Lions, Sunday, Oct. 16, 2011 in Detroit. The Lions called for a review and the replay confirmed the touchdown called on the field. (AP Photo/Duane Burleson)

San Francisco 49ers linebacker Aldon Smith (99) celebrates after an NFL football game against the Detroit Lions in Detroit, Sunday, Oct. 16, 2011. San Francisco won 25-19. (AP Photo/Rick Osentoski)

San Francisco 49ers tight end Delanie Walker (46) shouts while celebrating his go-ahead touchdown against the Detroit Lions in the fourth quarter of an NFL football game on Sunday, Oct. 16, 2011, in Detroit. The 49ers defeated the Lions 25-19. (AP Photo/Duane Burleson)

San Francisco 49ers wide receiver Ted Ginn (19) is tackled by Detroit Lions linebacker Doug Hogue during the third quarter of an NFL football game in Detroit, Sunday, Oct. 16, 2011. (AP Photo/Carlos Osorio)

San Francisco 49ers defensive end Justin Smith (94) sacks Detroit Lions quarterback Matthew Stafford (9) in the fourth quarter of an NFL football game in Detroit, Sunday, Oct. 16, 2011. (AP Photo/Rick Osentoski)

Detroit Lions quarterback Matthew Stafford (9) passes the ball in the second half of an NFL football game against the San Francisco 49ers in Detroit, Sunday, Oct. 16, 2011. (AP Photo/Rick Osentoski)

Detroit Lions wide receiver Calvin Johnson (81) is tackled by San Francisco 49ers free safety Dashon Goldson (38) after making a first-down catch in the third quarter of an NFL football game on Sunday, Oct. 16, 2011, in Detroit. The 49ers defeated the Lions 25-19. (AP Photo/Duane Burleson)

Detroit Lions quarterback Matthew Stafford (9) is sacked by San Francisco 49ers defensive end Justin Smith, left, for a five-yard loss in the third quarter of an NFL football game on Sunday, Oct. 16, 2011, in Detroit. The 49ers defeated the Lions 25-19. (AP Photo/Duane Burleson)

San Francisco 49ers quarterback Alex Smith (11) is sacked by Detroit Lions middle linebacker Stephen Tulloch (55) defensive tackle Corey Williams (99) closes in for a seven-yard loss in the third quarter of an NFL football game on Sunday, Oct. 16, 2011, in Detroit. The 49ers defeated the Lions 25-19. (AP Photo/Duane Burleson)

Detroit Lions quarterback Matthew Stafford, left, reacts on the bench in the closing seconds of an NFL football game against the San Francisco 49ers in Detroit, Sunday, Oct. 16, 2011. San Francisco defeated the Lions 25-19. (AP Photo/Carlos Osorio)

San Francisco 49ers tight end Delanie Walker (46) celebrates his fourth quarter touchdown with wide receiver Michael Crabtree (15) to take the lead in an NFL football game Sunday, Oct. 16, 2011 in Detroit. The 49ers defeated the Lions 25-19. (AP Photo/Duane Burleson)

Detroit Lions quarterback Matthew Stafford (9) is pursued by San Francisco 49ers defensive end Justin Smith, right, and sacked for a five yard loss in the third quarter of an NFL football game Sunday, Oct. 16, 2011 in Detroit. The 49ers defeated the Lions 25-19. (AP Photo/Duane Burleson)

The Detroit Lions prepare to walk onto the field before during the first quarter of an NFL football game against the San Francisco 49ers in Detroit, Sunday, Oct. 16, 2011. (AP Photo/Carlos Osorio)

Detroit Lions defensive tackle Nick Fairley (98) sit on the sideline during an NFL football game against the San Francisco 49ers in Detroit, Sunday, Oct. 16, 2011. (AP Photo/Rick Osentoski)

San Francisco 49ers running back Kendall Hunter (32) is up ended by Detroit Lions free safety Louis Delmas, bottom, in the fourth quarter of an NFL football game in Detroit, Sunday, Oct. 16, 2011. (AP Photo/Rick Osentoski)

San Francisco 49ers wide receiver Ted Ginn (19) is tackled by Detroit Lions linebacker Doug Hogue during the third quarter of an NFL football game in Detroit, Sunday, Oct. 16, 2011. (AP Photo/Carlos Osorio)

Detroit Lions wide receiver Calvin Johnson (81) avoids a tackle by San Francisco 49ers free safety Dashon Goldson (38) on a 41-yard pass-play in the fourth quarter of an NFL football game on Sunday, Oct. 16, 2011, in Detroit. (AP Photo/Duane Burleson)

San Francisco 49ers wide receiver Michael Crabtree (15) tries to avoid a tackle by Detroit Lions cornerback Eric Wright (21) in the fourth quarter of an NFL football game in Detroit, Sunday, Oct. 16, 2011. (AP Photo/Rick Osentoski)

Oct 16, 2011; Detroit, OH, USA; San Francisco 49ers offensive tackle Alex Boone (75) fights after defeating the Detroit Lions 25-19 at Ford Field. Mandatory Credit: Andrew Weber- US PRESSWIRE

Oct 16, 2011; Detroit, OH, USA; Detroit Lions head coach Jim Schwartz gets in a fight after losing to the San Francisco 49ers 25-19 at Ford Field. Mandatory Credit: Andrew Weber- US PRESSWIRE

Oct 16, 2011; Detroit, OH, USA; Detroit Lions head coach Jim Schwartz gets escorted off the field after losing to the San Francisco 49ers 25-19 at Ford Field. Mandatory Credit: Andrew Weber- US PRESSWIRE

Oct 16, 2011; Detroit, OH, USA; Detroit Lions head coach Jim Schwartz gets in a fight after losing to the San Francisco 49ers 25-19 at Ford Field. Mandatory Credit: Andrew Weber- US PRESSWIRE

Oct 16, 2011; Detroit, OH, USA; Detroit Lions head coach Jim Schwartz gets in a fight after losing to the San Francisco 49ers 25-19 at Ford Field. Mandatory Credit: Andrew Weber- US PRESSWIRE

Oct 16, 2011; Detroit, OH, USA; Detroit Lions head coach Jim Schwartz gets in a fight after losing to the San Francisco 49ers 25-19 at Ford Field. Mandatory Credit: Andrew Weber- US PRESSWIRE

Oct 16, 2011; Detroit, OH, USA; San Francisco 49ers head coach Jim Harbaugh (left) fights with Detroit Lions head coach Jim Schwartz after the game at Ford Field. Mandatory Credit: Andrew Weber- US PRESSWIRE

Oct 16, 2011; Detroit, OH, USA; San Francisco 49ers head coach Jim Harbaugh celebrates after defeating the Detroit Lions 25-19 at Ford Field. Mandatory Credit: Andrew Weber- US PRESSWIRE

Oct 16, 2011; Detroit, OH, USA; Detroit Lions head coach Jim Schwartz (left) shakes hands with San Francisco 49ers head coach Jim Harbaugh at the end of the game at Ford Field. San Francisco 49ers defatted Detroit Lions 25-19. Mandatory Credit: Andrew Weber- US PRESSWIRE

Oct 16, 2011; Detroit, OH, USA; Detroit Lions and the San Francisco 49ers fight after the game at Ford Field. Mandatory Credit: Andrew Weber- US PRESSWIRE

Oct 16, 2011; Detroit, MI, USA; Detroit Lions head coach Jim Schwartz (left) shakes hands with San Francisco 49ers head coach Jim Harbaugh at the end of the game at Ford Field. San Francisco 49ers defatted Detroit Lions 25-19. Mandatory Credit: Andrew Weber- US PRESSWIRE