Buffalo Bills receiver David Nelson sustained a strained tendon in his right knee on Saturday, and it will keep him out of practice for four or five days. But the injury looked more serious than that when it occurred. "It's nothing serious," Nelson said, according to the Buffalo News. "No long-term damage. The way it looked on film, the way it felt on the field, I'm very lucky to have the diagnosis I got." Nelson was injured Saturday when defensive end Mario Williams rolled up on his leg. "When it first happened, I thought it was blown," Nelson said. "... You see that happen a lot, so I thought I was done. Coming in, we did some different testing on it, and it all came back negative, so that's a positive sign and I should be back in a few days." Nelson played in 16 games last season, including 13 starts, and had 61 receptions for 658 yards and five touchdowns.