 Walker was one of only two goalkeepers in the country to be invited for full time residency at the ARCO Olympic Training Center in preparation for the '96 Olympic Games.Upon the formation of Major League Soccer (MLS) in 2006, Walker was drafted 28th overall in the 1996 MLS Supplemental Draft, and became a third-string goalkeeper of the 1996 Dallas Burn, behind Mark Dodd.Unhappy with his situation, he left MLS and played for the now-defunct Jacksonville Cyclones of the A-League.