Bills offensive tackle LaAdrian Waddle has a torn quad, according to Adam Schefter of ESPN.com (on Twitter). It’s likely a season-ending injury, since quad tears usually require four or five months of recovery. 
The Bills signed Spencer Long, Mitch Morse, Ty Nsekhe and Jon Feliciano this offseason as a part of their offensive line revamp. Waddle, an experienced vet, factored into the plans, but they’ll have to make a depth addition to make up for his absence.
Waddle’s run as a Lions starter did not produce a long tenure in Detroit, and after being waived in 2015, he landed in New England. He was a part of two Super Bowl champions, the second such run including three starts. His departure to Buffalo continued the exodus of recent Patriot tackles, with Waddle’s defection following those of Nate Solder, Cameron Fleming and Trent Brown.
Waddle’s one-year, $2MM called for $1MM in base salary.
I won’t ask how you tear a quad practicing with a pillow.