Center Dominic Raiola stated his case, but had his appeal of his one-game suspension denied.
Raiola presented his argument by phone Tuesday afternoon to Hall of Fame linebacker Derrick Brooks, a mediator appointed by the league and NFL Players Association.
The NFL announced Raiola's suspension without pay Monday after he stomped on Bears defensive tackle Ego Ferguson's ankle in the Lions' win at Soldier Field Sunday. A 14-year veteran with the Lions, Raiola will miss the chance to win his first division title this Sunday in Green Bay.
Raiola, who turns 36 next week, started 99 straight games and 203 in his career. Due to become an unrestricted free agent in 2015, there's a chance Raiola played his final regular-season game last week.
Sunday will be Matthew Stafford's first game without Raiola at center. Rookie Travis Swanson is likely to get the call in place of Raiola.
The ironman center said the incident with Ferguson was inadvertent, and Lions coach Jim Caldwell defended him Monday.
"I believe what Dom told me that it was inadvertent," Caldwell said. "But I can also see why obviously it's being reviewed by the league and everybody's taking a real good look at it because you can also see the other side of that as well."
A third-round pick, Swanson started four games this year at right guard when Larry Warford was out with a knee injury, but center is his best position after playing 50 games there for Arkansas.
On a teleconference Tuesday, Packers coach Mike McCarthy was unsure of how losing Raiola would impact the Lions.
"I don't know that. I'm sure time will tell," he said. "Our personnel department really liked Travis Swanson coming out. He's also been playing in their OT packages. He looks like he's definitely a young player that has a future in front of him."
McCarthy offered more praise of Swanson, noting the interior lineman's ability to play as a sixth offensive lineman in some of the Lions' run packages.
"He's a good football player," McCarthy said. "His size, he looks like he's definitely in control. … The fact that your backup center is out there playing the tight end position I think says a lot about him."