Green Bay Packers
He was signed by the Green Bay Packers as an undrafted free agent in 2008. He made the regular season roster after an impressive training camp. He was placed on injured reserve on October 11. He was released on September 5, 2009 after final cuts and re-signed to the practice squad the following day. On January 11, 2010 he signed a reserve future contract.
Lumpkin was released on September 4, 2010.
Tampa Bay Buccaneers
On September 5, 2010, Lumpkin was claimed off waivers by the Tampa Bay Buccaneers.
Lumpkin signed with the Seattle Seahawks on March 23, 2012. He was waived on September 18.