CHARLESTON, W.Va. -- Laythen Good, the top rusher each of the past two seasons at Buffalo, will likely miss his senior season following a knee injury. He was hurt in 7-on-7 drills during the recent three-week out-of-season practice period.Last year, Good ran for 783 yards and 10 touchdowns and caught 38 passes for 759 yards and seven more scores. In his first three years, Good gained 1,590 yards on the ground, grabbed 84 passes for 1,364 yards and 13 scores and had 36 total TDs."It was just a freak thing, basically'' said Bison coach Mike Sawyer. "He intercepted the ball and was returning it on the turf [at Point Pleasant], went to juke a guy and I guess it got caught in the turf."Everything we worked on in the off-season, things we planned on doing, we've got to change it all now. We've got to move people around, and things are going to be a little different. We're young away, and now we're even younger.''