Walker was drafted by the Chicago Cubs in the 16th round of the 2009 MLB Draft, after attending Judge Memorial Catholic High School but did not sign. Walker was drafted again this time by the Philadelphia Phillies in the 38th round of the 2010 MLB Draft but did not sign. He attended Central Arizona College.[1] Walker was drafted for the third year in a row, by the Chicago White Sox in the 1st round (47th overall) of the 2011 MLB Draft. Walker started his baseball career in 2011 at the Rookie level with the Great Falls Voyagers[2] and then was promoted to Class AKannapolis Intimidators. In 2011 combined, Walker hit .257 in 222 at-bats with no HRs, 24 RBI, and 21 SBs. In 2012, Walker started the year at Kannapolis but was later promoted to Class A-AdvancedWinston-Salem Dash. In 2012 combined, Walker hit .267 in 409 at-bats with four home runs, 55 RBI, and 56 stolen bases. Before the 2013 season, Walker was ranked the White Sox #8 prospect.[3] Walker was promoted to Double-ABirmingham Barons before the start of the 2013 season. Walker spent the entire season in Birmingham and he batted .201 in 462 at bats with three home runs, 32 RBI, and 38 stolen bases. Walker split the 2014 and 2015 seasons between the advanced Single-A Winston-Salem Dash and Double-A Birmingham Barons, slashing .197/.277/.265 between the two in 2014, and .226/.308/.286 in 2015. Walker spent the entirety of 2016 in Birmingham, hitting .240/.330/.340 with 3 home runs and 28 RBI in 329 at-bats.[4] Walker was released by the White Sox on April 4, 2017.[5]
On April 28, 2017, Walker signed with the Windy City ThunderBolts of the Frontier League.[6] On the season, Walker hit .225/.316/.342 with 6 home runs and 31 RBI in 95 games with the ThunderBolts.
