Tressel was forced to resign in May after breaking NCAA rules in a memorabilia-for-tattoos scandal involving several Buckeyes players. He is on the sideline watching as the Browns go through another morning workout.
With his hands folded behind his back, a pose familiar to Ohio State's loyal fans, Tressel visited with Browns president Mike Holmgren on Monday as he kept a close eye on Cleveland's first-team offense and defense doing drills.
It's a homecoming for Tressel, who grew up in Berea and played at nearby Baldwin-Wallace College. Tressel has not made it known if he intends to coach again. There have long been rumors about him jumping to the NFL.
Also visiting camp is former Michigan coach Lloyd Carr.