BILLS BUFFALO

Buffalo added interior defensive line depth Tuesday, agreeing to terms with seven-year veteran Greg Gaines, who spent the last three seasons in Tampa Bay.

Buffalo receiver Keon Coleman did not practice Tuesday and was spotted in a walking boot, though the team previously expected him to be fine after a preseason knock.

Buffalo's starting center said he's feeling good but still a few weeks out, with the regular-season opener the target for his return.

Buffalo's quarterback found his receiver for the first touchdown at the Bills' new home in Saturday's preseason opener against the Panthers.

Bills DT Phidarian Mathis has been suspended three games for violating the NFL's Substance Abuse Policy, Ari Meirov reported.