Bengals left tackle Andrew Whitworth, who sat out practice on Wednesday and Thursday with a knee injury, was not participating in on-field team activities in the portion of practice open to media on Friday, according to Geoff Hobson of Bengals.com.
According to Hobson, Whitworth was present, but working on the side of the field, and he was not wearing his jersey.
Whitworth, 31, has not missed a game since 2008. Anthony Collins will start in his place if he is unable to play in Sunday’s regular-season opener against Chicago.
A sixth-year pro from Kansas, Collins has started 18 regular-season games for Cincinnati since 2008.
“He’s had a really good camp,” Bengals quarterback Andy Dalton said of Collins on Wednesday, according to the club. “He’s a player that’s been around for a while and understands everything we’re doing. So I’m really comfortable with A.C. out there.”
UPDATE 4:00 p.m. EST: Whitworth is listed as doubtful on the club’s Friday injury report.