By Kelsey Williams, SFGate: Looks like Michael Vick has completed the comeback no one thought possible. CNBC reports: &ldquo;In a remarkable move, Nike, which severed Vick&rsquo;s contract in 2007 after he admitted to his involvement in a dogfighting ring, has re-signed the Philadelphia Eagles quarterback.&rdquo; Vick&rsquo;s agent Joel Segal said that &ldquo;Michael is excited to [...]