UNLV will open on Thursday night at Peter Johann Memorial Field.
Senior midfielder from Reno gives UNLV two selections in the MLS draft for first time in school history.
Las Vegas native is the third Rebel in the past four years to be selected in the MLS Superdraft.
Oscar Velazquez was named to the team for the fourth straight year.
Senior led the nation in scoring this season.
Mehlich also named all-region.
Seattle claimed penalty kick shootout 4-2 after a double-overtime tie.
UNLV is looking for a third trip to the WAC championship game in four years.
Sophomore goalkeeper is the fourth from UNLV to earn all-district academic honors in the past four years.
UNLV will play in its fourth straight semifinal.