The Kansas City Chiefs defensive lineman had his high school jersey retired at a Tuesday night high school basketball game in Oklahoma and the local newspaper wrote after the event: "Gregg hasn't announced it yet, but he plans to retire after a long NFL career."
The sub-headline of the story says Gregg is "considering retirement" so we'll see. Gregg doesn't seem like the type to have a big to-do about his retirement so I wonder if, when and how he'll make it official.
If this is it for Gregg, it caps an impressive career. He spent 11 seasons with the Baltimore Ravens, including a Super Bowl ring as a member of the Ravens practice squad in 2000, before landing in KC.