‘The Bills need to find an impact defensive tackle to make their run defense more sturdy. They are very likely to lose middle linebacker London Fletcher, whose contract is up. They are expected to try to re-sign starting defensive end Chris Kelsay, but his contract also is up. They need to make a decision on whether they think Takeo Spikes can regain his form at outside linebacker. In the secondary, they are virtually certain to lose cornerback Nate Clements, who is poised to strike it rich in free agency.’