3. 2004: Wes Welker
When Wes Welker came into the NFL in 2004 with the San Diego Chargers he was too small, not athletic enough and many thought he would never make an impact. After nine seasons in the NFL, those people are still banging their heads against the walls.
Welker had little impact in his first three seasons in the NFL, posting a career-high of just 67 catches in 2006 with the Dolphins. Then Welker landed in New England in 2007. Since then Welker has posted an NFL-high 672 catches with five of his six seasons over 100 catches.