San Francisco 49ers COACH MIKE MARTZ AND ALEX SMITH during mini camp in Santa Clara, CA on May 2, 2008

Jan 1, 2005; Tempe, AZ, USA; Utah Utes quarterback #11 Alex Smith throws a pass during the second quarter of the Tostitos Fiesta Bowl against the Pittsburgh Panthers...

...Francisco, CA, USA; Detroit Lions safety Louis Delmas (26) puts pressure on San Francisco 49ers quarterback Alex Smith (11) during the first quarter at Candlestick Park

...Francisco, CA, USA; Detroit Lions safety Louis Delmas (26) puts pressure on San Francisco 49ers quarterback Alex Smith (11) during the first quarter at Candlestick Park

PHILADELPHIA - DECEMBER 20: Alex Smith #11 of the San Francisco 49ers drops back to pass against the Philadelphia Eagles at Lincoln...

CAPTION: Dec 6, 2009; Seattle, WA, USA; San Francisco 49ers quarterback Alex Smith (11) during the game against the Seattle Seahawks at Qwest Field. The Seahawks defeated the 49ers...

SAN FRANCISCO - DECEMBER 14: Quarterback Alex Smith #11 of the San Francisco 49ers throws the ball in the second quarter against the Arizona...

San Francisco 49ers quarterback Alex Smith (11) passes against the Arizona Cardinals in the first quarter of an NFL football game in...

25 October 2009: Head coach Mike Singletary and quarterback Alex Smith #11 of the San Francisco 49ers on the sidelines against the Houston Texans at Reliant Stadium...

...Jets defeated the Panthers 17-6. (Photo by Jim McIsaac/Getty Images) SAN FRANCISCO - NOVEMBER 29: Alex Smith #11 of the San Francisco 49ers drops back to pass during their game against the Jacksonville...

Dec 6, 2009; Seattle, WA, USA; San Francisco 49ers quarterback Alex Smith (11) throws the ball during the first quarter against the Seattle Seahawks at Qwest Field

SEATTLE - DECEMBER 06: Quarterback Alex Smith #11 of the San Francisco 49ers passes against the Seattle Seahawks on December 6, 2009 at...

November 29, 2009; San Francisco, CA, USA; San Francisco 49ers quarterback Alex Smith (11) passes the ball during the second quarter against the Jacksonville Jaguars at Candlestick Park

San Francisco 49ers center Eric Heitmann, left, snaps the ball to San Francisco 49ers quarterback Alex Smith, right, during their NFL football game against the Tennessee Titans in San Francisco, Sunday, Nov. 8...

October 25, 2009; Houston, TX USA; San Francisco 49ers quarterback Alex Smith (11) passes under pressure against the Houston Texans in the second half at the Reliant Stadium...