Vargas had 12 goals and six assists in 23 appearances. Marlon Vargas enjoyed a breakout professional campaign with a team-leading 12 goals and six assists while leading the Tacoma Defiance to their best-ever finish. As a result, he has been named to the inaugural MLS NEXT Pro Best XI, it was announced on Friday. The honor was determined by a vote of the league’s head coaches and chief soccer officers, as well as league-wide broadcasters and content producers. Vargas first joined the Sounders Academy in 2016 and signed his first professional contract at 17 years old in 2018 with what…