The Bills have signed DT Spencer Johnson to a 5-year contract.  Johnson played in 16 games last season with the Vikings and he made 22 tackles, had 3 sacks and forced a fumble.  He has now played in 49 games in his NFL career and he has made 106 tackles, defensed 3 passes, has 4 sacks and he’s forced 1 fumble.  Johnson will likely team inside with Marcus Stroud which will improve the run defense of the Bills big-time.