ST. PAUL, Minn. – The Upper Midwest Athletic Conference has announced its Player of the Week winners, and two University of Northwestern student-athletes were celebrated. UMAC Press Release Aaron Severson (Columbia Heights, Minn./Columbia Heights) brings home his first-career weekly award after being named UMAC Baseball Pitcher of the Week. The two-way player was outstanding both on the mound and at the plate Saturday at Bethany Lutheran. Severson is the third different UNW pitcher to win the award this season, which they have won four times. Elise Jarchow (Luverne, Minn./Luverne) was named UMAC Women’s Tennis North Division Player of the Week…