Lions coach Dan Campbell was sleepless before 1st practice

Detroit Lions tackle Taylor Decker, left, and guard Jonah Jackson walk to the field before drills at the Lions NFL football camp practice, Wednesday, July 28, 2021, in Allen Park, Mich. (AP Photo/Carlos Osorio)

Detroit Lions receiver Quintez Cephus catches during a drill at the Lions NFL football camp practice, Wednesday, July 28, 2021, in Allen Park, Mich. (AP Photo/Carlos Osorio)

Detroit Lions head coach Dan Campbell greets offensive linebacker Charles Harris before drills at the Lions NFL football camp practice, Wednesday, July 28, 2021, in Allen Park, Mich. (AP Photo/Carlos Osorio)

Detroit Lions running back D'Andre Swift greets team security director Elton Moore before drills at the Lions NFL football camp practice, Wednesday, July 28, 2021, in Allen Park, Mich. (AP Photo/Carlos Osorio)

Detroit Lions quarterbacks Jared Goff, right, David Blough (10) and Tim Boyle (12) run through a drill at the Lions NFL football camp practice, Wednesday, July 28, 2021, in Allen Park, Mich. (AP Photo/Carlos Osorio)

Detroit Lions quarterback Jared Goff throws during drills at the Lions NFL football camp practice, Wednesday, July 28, 2021, in Allen Park, Mich. (AP Photo/Carlos Osorio)

Detroit Lions General Manager Brad Holmes laughs as he talks with team Chair Emeritus/Owner Martha Firestone Ford during drills at the Lions NFL football camp practice, Wednesday, July 28, 2021, in Allen Park, Mich. (AP Photo/Carlos Osorio)

Detroit Lions tight end T.J. Hockenson walks to the field before drills at the Lions NFL football camp practice, Wednesday, July 28, 2021, in Allen Park, Mich. (AP Photo/Carlos Osorio)