NFL notebook: Dolphins tight end suffers serious knee injury
• Dolphins tight end Dustin Keller is lost for the season — and possibly longer — with a catastrophic knee injury suffered Saturday night. An MRI indicated Keller tore three ligaments and potentially suffered nerve damage — a potentially career-threatening injury.
• NFL.com's Ian Rapoport reported that Denver Pro Bowl cornerback Champ Bailey is dealing with a serious foot sprain he suffered Saturday. Bailey avoided a fracture or tear, and he faces a recovery time of several weeks, according to the source. Wes Welker suffered a mild right ankle sprain but should be fine for the opener.
• Giants receiver Victor Cruz left Sunday night's game against the Colts with a bruised heel.
• The Broncos' Derek Wolfe said he'll be back on the field soon. Wolfe accompanied his teammates on their flight home after being whisked from the field Saturday night in an ambulance after a scary scene in which he lay prone for a few minutes following a hit to his head and neck. Medical staff strapped him to a backboard and sent him to a hospital for evaluation of a possible cervical spine injury. X-rays, CT scans and MRIs were negative, however.
• Bengals released linebacker Aaron Maybin, a fifth-year player who signed with Cincinnati as a free agent in January. Maybin was Buffalo's first-round pick out of Penn State in 2009.
• The Bears signed QB Trent Edwards to a one-year contract. Edwards has started 33 games in a five-season career with Buffalo, Jacksonville, Oakland and Philadelphia.
• Pro Bowl running back Jamaal Charles returned to Chiefs practice with no hesitation despite a lingering right foot strain that caused soreness to travel halfway up his leg.
— Wire reports