John David Booty of the USC Trojans during the game against the UCLA Bruins at the Los Angeles Memorial Coliseum in Los Angeles, California on December 1, 2007. The Trojans defeated the Bruins 24 - 7 and secured a spot in the Rose Bowl game. (Photo by Ben Liebenberg/NFL.com)

John David Booty of the USC leads the Trojans out to the field during the game against the University of Idaho Vandals at the Los Angeles Memorial Coliseum on September 1, 2007 in Los Angeles, California. (Photo by Ben Liebenberg/NFL.com)

John David Booty participates in position drills during USC's Pro Day at Cromwell Field in Los Angeles, California on April 2, 2008. (Photo by Ben Liebenberg/NFL.com)

Senior John David Boot of the USC Trojans makes his way on to the field prior to the start the game against the UCLA Bruins at the Los Angeles Memorial Coliseum in Los Angeles, California on December 1, 2007. The Trojans defeated the Bruins 24 - 7 and secured a spot in the Rose Bowl game. (Photo by Ben Liebenberg/NFL.com)

John David Booty of the USC Trojans rolls out of the pocket during the game against the UCLA Bruins at the Los Angeles Memorial Coliseum in Los Angeles, California on December 1, 2007. The Trojans defeated the Bruins 24 - 7 and secured a spot in the Rose Bowl game. (Photo by Ben Liebenberg/NFL.com)

John David Booty of the USC Trojans in action against the Washington State Cougars at the Los Angeles Coliseum in Los Angeles, California on September 22, 2007. The Trojans defeated the Cougars 47-14. (Photo by Ben Liebenberg/NFL.com)

John David Booty of the USC Trojans during the 2008 Rose Bowl game against the Illinois Fighting Illini at the Rose Bowl in Pasadena, California on January 1, 2008. The Trojans defeated the Illini 49 - 17. (Photo by Ben Liebenberg/NFL.com)

John David Booty of the USC Trojans during the 2008 Rose Bowl game against the Illinois Fighting Illini at the Rose Bowl in Pasadena, California on January 1, 2008. The Trojans defeated the Illini 49 - 17. (Photo by Ben Liebenberg/NFL.com)

Quarterback John David Booty of USC during the 2008 Scouting Combine at the RCA Dome in Indianapolis, Indiana on February 22, 2008. (Photo by Ben Liebenberg/NFL.com)

John David Booty of USC participates in drills during the 2008 Scouting Combine at the RCA Dome in Indianapolis, Indiana on February 24, 2008. (Photo by Ben Liebenberg/NFL.com)

John David Booty of USC participates in drills during the 2008 Scouting Combine at the RCA Dome in Indianapolis, Indiana on February 24, 2008. (Photo by Ben Liebenberg/NFL.com)

John David Booty of the USC Trojans celebrates wining following the 2008 Rose Bowl game against the Illinois Fighting Illini at the Rose Bowl in Pasadena, California on January 1, 2008. The Trojans defeated the Illini 49 - 17. (Photo by Ben Liebenberg/NFL.com)

John David Booty during USC's Pro Day at Cromwell Field in Los Angeles, California on April 2, 2008. (Photo by Ben Liebenberg/NFL.com)

USC quarterback John David Booty celebrates with the USC marching band after the 2008 Rose Bowl game against the Illinois Fighting Illini at the Rose Bowl in Pasadena, California on January 1, 2008. The Trojans defeated the Illini 49 - 17. (Photo by Ben Liebenberg/NFL.com)

Minnesota Vikings rookie quarterback John David Booty, a fifth round pick out of Southern California, throws during the Minnesota Vikings rookie camp Friday, May 2, 2008 in Eden Prairie, Minn. (AP Photo/Jim Mone)

Los Angeles - May 17: during the 2008 NFL PLAYERS Rookie Premiere at Los Angeles Memorial Coliseum in Los Angeles, California on May 17, 2008. (Photo by Ben Liebenberg/NFL.com)