Casey Wiegmann(notes), of the Denver Broncos, second from left, Aaron Kampman(notes), of the Green Bay Packers, and Jared DeVries(notes), of the Detroit Lions, right, carry the casket of Aplington-Parkersburg High School football coach Ed Thomas to the church for funeral services, Monday, June 29, 2009, in Parkersburg, Iowa. A gunman shot Thomas in the school's weight room last week. The three NFL players played for Thomas at the high school.

Detroit Lions running back Kevin Smith(notes) (34) runs through drills at the NFL football team's training facility in Allen Park, Mich., Thursday, June 25, 2009.

Detroit Lions quarterback Matthew Stafford(notes) (9) throws during football practice at the team's training facility in Allen Park, Mich., Thursday, June 25, 2009.

Detroit Lions quarterback Matthew Stafford(notes) (9) signals during drills at football practice at the team's training facility in Allen Park, Mich., Thursday, June 25, 2009.

Detroit Lions center Dominic Raiola(notes) runs through drills at the NFL football team's training facility in Allen Park, Mich., Thursday, June 25, 2009. The Lions have signed Raiola to a four-year contract extension. The team announced Thursday that the 6-foot-1, 295-pound starter will remain in Detroit through the 2013 season.

Detroit Lions owner William Clay Ford Sr. watches during NFL football minicamp Wednesday, June 24, 2009, in Allen Park, Mich.

Detroit Lions owner William Clay Ford Sr., center, and team general manager Martin Mayhew, right, talk with head coach Jim Schwartz during NFL football minicamp Wednesday, June 24, 2009, in Allen Park, Mich.

Detroit Lions owner William Clay Ford Sr., left, and team general manager Martin Mayhew look on from a customized golf cart during NFL football minicamp, Wednesday, June 24, 2009 in Allen Park, Mich.

Detroit Lions owner William Clay Ford Sr., left, and general manager Martin Mayhew watch during NFL football minicamp Wednesday, June 24, 2009, in Allen Park, Mich.

Detroit Lions linebacker Larry Foote(notes) motions during NFL football minicamp, Wednesday, June 24, 2009, in Allen Park, Mich.

Detroit Lions linebacker Julian Peterson(notes) makes a catch during NFL football minicamp, Wednesday, June 24, 2009, in Allen Park, Mich.

Detroit Lions wide receiver Bryant Johnson(notes) makes a catch during NFL football minicamp, Wednesday, June 24, 2009, in Allen Park, Mich.

Detroit Lions linebacker Larry Foote(notes), right, meets Chicago Cubs bench coach Alan Trammell during NFL football minicamp, Wednesday, June 24, 2009, in Allen Park, Mich.

Detroit Lions quarterback Drew Standon throws during NFL football minicamp ,Wednesday, June 24, 2009, in Allen Park, Mich.

Detroit Lions head coach Jim Schwartz looks on during NFL football minicamp, Wednesday, June 24, 2009, in Allen Park, Mich.

Detroit Lions quarterback Matthew Stafford(notes) throws during NFL football minicamp, Wednesday, June 24, 2009, in Allen Park, Mich.

Detroit Lions quarterback Daunte Culpepper(notes) throws during football minicamp, Wednesday, June 24, 2009, in Allen Park, Mich.

Detroit Lions quarterbacks, from left, Matthew Stafford(notes), Drew Stanton(notes), and Daunte Culpepper(notes) line up for a drill during football minicamp, Wednesday, June 24, 2009, in Allen Park, Mich.

Detroit Lions quarterbacks Daunte Culpepper(notes) (11), Matthew Stafford(notes) (9), and Drew Stanton(notes) (5) run drills during football minicamp, Wednesday, June 24, 2009, in Allen Park, Mich.

Detroit Lions rookie quarterback Matthew Stafford(notes) smiles during the first day of the NFL football team's minicamp Tuesday, June 23, 2009, in Allen Park, Mich.

Detroit Lions wide receiver Calvin Johnson(notes) makes a catch during the first day of minicamp Tuesday, June 23, 2009, in Allen Park, Mich.

Detroit Lions rookie quarterback Matthew Stafford(notes) stretches during football minicamp on Tuesday, June 23, 2009, in Allen Park, Mich.

Detroit Lions running backs Aveion Cason(notes), left, tries to strip the ball from Kevin Smith(notes) during football minicamp Tuesday, June 23, 2009 in Allen Park, Mich.

Detroit Lions defensive tackle Chuck Darby(notes) reaches for a football during the NFL team's minicamp Tuesday, June 23, 2009, in Allen Park, Mich.

Detroit Lions rookie quarterback Matthew Stafford(notes) smiles while stretching during the NFL football team's minicamp Tuesday, June 23, 2009, in Allen Park, Mich.