ALLEN PARK — Even though he was on the field for the offseason training activities Thursday morning, tight end Brandon Pettigrew still has a ways to go while rehabbing from ACL knee surgery. He expects to be a full-go for the first regular season game.

Also on the field Thursday morning were running back Kevin Smith and CB Jack Williams who both are coming off ACL surgery.

“Those guys are starting to do individual-type drills and stuff like that, they’re still not even close to being cleared for team work and competitive stuff,’’ coach Jim Schwartz said. “They’re not right in the middle of a long-term rehab, they’re probably more past the middle, but they still have a long way to go. ... Hopefully by the time training camp comes they’ll be able to be on the field and not have many limitations.’’

Safety Ko Simpson, who underwent microfracture surgery, watched from the sidelines. He is expected to be back early in the regular season.

Tight end Tony Scheffler and running back Aaron Brown were excused for the day.