The former NYCFC product received 79% of the vote and follows Sergino Dest, Alex Mendez, Josh Sargent and Christian Pulisic as the most recent winners of the award. He also joins USMNT greats Landon Donovan (2000), Michael Bradley (2007) and Jozy Altidore on the list of honorees.
The award was first given out in 1998 when Josh Wolff took home the prize.
Reyna has made 39 appearances over all competitions in 2020, producing five goals and seven assists.
He has played in all 13 league games for Dortmund in the 2020-21 season, adding three goals and four assists. Reyna has also been a standout in the Champions League this campaign, appearing in all six matches thus far while starting in four.
McKennie, 22, received 44% of the tabulated votes, followed by Christian Pulisic (27%) and Sergino Dest (14%).