NFL In 2003, he signed as an undrafted rookie with the
Miami Dolphins of the
National Football League. He was waived after training camp on August 31, 2003. The Dolphins put him on waivers and he was assigned to the practice squad on November 11. On November 24, he was released by the Dolphins. Miami re-signed him on December 31, 2003 and he played in their last two games.
Ottawa Renegades He was acquired by the
Ottawa Renegades in a late season trade in
2004 after spending time on the
Edmonton Eskimos' practice roster. Edmonton traded their first and second picks in the
2005 CFL draft, along with Banks, to Ottawa in exchange for
Clinton Wayne and
Patrick Kabongo. In 2004, he had seven tackles in three games for Ottawa. Korey had an outstanding
2005 season with a league-leading 10 interceptions, two touchdowns, 44 tackles, 12 pass knockdowns, two forced fumbles and one fumble recovery. He was the Renegades' nominee for
Most Outstanding Defensive Player and was named a
2005 CFL All-Star.
BC Lions When the Renegades were suspended after the 2005 season, Banks was drafted in the first round, 6th overall, by the BC Lions in the 2006
Ottawa Renegades Dispersal Draft. Banks recorded a touchdown and 7 interceptions in his first season with the Lions in which he helped them win the
94th Grey Cup. He has since been named a CFL All-Star in 2006, 2009, 2011 and 2012 as well as a West Division All-Star from 2006 to 2011. Following the
2013 CFL season Banks entered his optional year of his contract, he expressed his desire to negotiate a new contract extension at an increased salary to what his option year salary would pay him. The BC Lions refused to grant Banks a contract extension.
Winnipeg Blue Bombers On January 31, 2014, Banks was traded to the Winnipeg Blue Bombers in exchange for non-import wide receiver
Kito Poblah. On February 19, 2014, the Bombers signed Banks to a contract extension through the
2015 CFL season. Banks was reportedly a healthy scratch for the Bombers' first game of the season and was eventually released on June 29, 2014 when he could not be traded. ==Personal life==