Buffalo Bills wide receiver Stevie Johnson left Friday's practice with a hamstring injury and was scheduled for tests to determine how long he might be sidelined.
Johnson went down during a red zone drill near the end of Friday's practice. The Bills' leading receiver, Johnson has lined up primarily in the slot in training camp. The decisive route-runner also lines up outside in single- or two-receiver sets.
Bills coach Doug Marrone was unsure of the severity of the injury.
"He's going to get evaluated, and it's always tough when those situations happen," Marrone said after practice. "It would be a major concern if we were talking about it during the season. Right now, a veteran player who has proved himself, we'll just see what the doctors say, it is what it is and we'll deal with it from there."
Rookie second-round pick Robert Woods has been impressive in the early going, but depth would be a concern. Second-year starter T.J. Graham, a third-round pick in 2012, and rookie speedster Marquise Goodwin, would work with the first team in Johnson's absence. It might be Woods who emerges as the team's lead receiver should Johnson's injury prove to be serious.
"When he came into OTAs and even out here for trainning camp, he looks like a 10-year veteran. That's exactly what we thought of him: Polished," said general manager Doug Whaley.