[6][7] He made his professional debut with the Tri-City Dust Devils, playing in 68 games and hitting .256 with 5 home runs and 35 RBI.
[8] Wheeler spent the 2010 season with the High-A Modesto Nuts, playing in 129 games and hitting .249/.341/.384 with 12 home runs, 63 RBI, and 22 stolen bases.
[9] He played in 138 games with the Double-A Tulsa Drillers in 2011, batting .287/.365/.535 with career-highs in home runs (33) and RBI (86), and 21 stolen bases.
He missed significant time that season, finishing with a .303 batting average and 2 home runs in 92 games for the Triple-A Colorado Springs Sky Sox.
[12] Wheeler spent a third straight season with Colorado Springs in 2014, making 119 appearances and slashing .233/.313/.387 with 11 home runs, 45 RBI, and 9 stolen bases.