The 24-year-old, selected from Louisville with the seventh pick in January's draft, made 28 consecutive starts and received 140 percent of weighted ballots added from team, media and player votes, the league said Monday.
D.C. United midfielder Nick DeLeon was second with 74 percent, followed by Vancouver forward Darren Mattocks with 26 percent.
MLS also said New England won the team Fair Play Award and Chicago midfielder Logan Pause won the individual Fair Play Award.
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