Dallas Cowboys defensive coordinator Rob Ryan, left, and head coach Jason Garrett, center, watch running back Lance Dunbat (25) during NFL football practice at Cowboys Stadium Thursday, June 14, 2012, in Arlington, Texas. Ryan knows he tried to do too much in his first season as defensive coordinator with the Cowboys, especially with no offseason workouts because of the lockout. But he believes the defense just lost confidence after starting off fast. (AP Photo/LM Otero)

Dallas Cowboys defensive coordinator Rob Ryan laughs during NFL football practice at Cowboys Stadium Thursday, June 14, 2012, in Arlington, Texas. Ryan knows he tried to do too much in his first season as defensive coordinator with the Cowboys, especially with no offseason workouts because of the lockout. (AP Photo/LM Otero)

Dallas Cowboys quarterback Tony Romo (9) talks with running back DeMarco Murray (26) during NFL football practice at Cowboys Stadium Thursday, June 14, 2012 in Arlington, Texas. (AP Photo/LM Otero)

Dallas Cowboys owner Jerry Jones during NFL football practice at Cowboys Stadium Thursday, June 14, 2012, in Arlington, Texas. (AP Photo/LM Otero)

Dallas Cowboys quarterback Tony Romo (9) lines up during NFL football practice at Cowboys Stadium Thursday, June 14, 2012 in Arlington, Texas. (AP Photo/LM Otero)

Dallas Cowboys head coach Jason Garrett makes a point during NFL football practice at Cowboys Stadium Thursday, June 14, 2012 in Arlington, Texas. (AP Photo/LM Otero)

Washington State head football coach Mike Leach, left, talks with Dallas Cowboys owner Jerry Jones during NFL football practice at Cowboys Stadium Thursday, June 14, 2012 in Arlington, Texas. (AP Photo/LM Otero)

Dallas Cowboys defensive coordinator Rob Ryan, left, during NFL football practice at Cowboys Stadium Thursday, June 14, 2012, in Arlington, Texas (AP Photo/LM Otero).

Dallas Cowboys wife receiver Dez Bryant (88) during NFL football practice at Cowboys Stadium Thursday, June 14, 2012 in Arlington, Texas. (AP Photo/LM Otero)

Dallas Cowboys cornerback Mike Jenkins sits out during NFL football practice at Cowboys Stadium, Thursday, June 14, 2012 in Arlington, Texas. (AP Photo/LM Otero)

Dallas Cowboys wife receiver Dez Bryant (88) grabs a pass during NFL football practice at Cowboys Stadium Thursday, June 14, 2012 in Arlington, Texas. (AP Photo/LM Otero)

Dallas Cowboys defensive coordinator Rob Ryan makes a point during NFL football practice at Cowboys Stadium Thursday, June 14, 2012, in Arlington, Texas. (AP Photo/LM Otero)