Kevin Kolb (knee) is day-to-day after slipping on a mat while switching practice fields, and its unclear whether it will affect his status for the Bills’ preseason opener on August 11th. It was a freak accident, but Buffalo does not believe the injury is serious. Still, it’s bad news for Kolb, who is locked into a battle for the starting job with rookie E.J. Manuel. After the veteran took most of the first-team reps in the opening week of camp, the rookie stepped in nicely for Kolb, and will take over the reps in the coming days. If Manuel continues to look good, it could shift the competition.

More bad news came out of Buffalo, as head coach Doug Marrone announced top receiver Steve Johnson (hamstring) will be announced at least a week after leaving practice on Friday. Buffalo is trying to install Marrone’s up-tempo offense, so even missing a week or so could put Johnson behind schedule with the playbook.

Patrick Peterson is a weapon, and Cardinals head coach Bruce Arians has ambitious plans to take advantage of the cornerback’s playmaking abilities with the ball. Arians announced Saturday that he has installed an offensive package for Peterson at both wide receiver and in the backfield. The shut-down corner, also one of the most premier punt returners in football, was seen catching passes over the middle during Saturday’s scrimmage.

In addition to the recent signing of Austin Collie, the 49ers picked up Lavelle Hawkins to help bolster an injury-riddled wide receiving corps. Hawkins had 71 receptions in five years with Tennessee, and could get a chance to compete for snaps, at least until the rest of the receivers get healthier.

Tony Romo isn’t going to play in the Hall of Fame game on Sunday, although the Cowboys said the minor back surgery he had in the offseason is not a factor in the decision. It sounds like Dallas is keeping Romo out as a protective measure, attributed mostly to the state of their offensive line, which is currently depleted with injuries.