The Rice Lake, Wisc., product chose to play close to home over the likes of Michigan State and Kentucky. Ellenson and center Diamond Stone are the two highest-rated prospects in the state of Wisconsin.
Ellenson is the No. 4 recruit in his class according to ESPN and No. 17 recruit according to Rivals.
"I felt Marquette was a place where I could make an immediate impact," Ellenson said. "I feel that I will have an opportunity to play multiple positions and show my versatility. Also, I was the most comfortable with the coaching staff, and a chance to play with my brother was something that was always big to me."
The 6-foot-10 forward also said he feels he'll be able to play multiple positions at Marquette, and believes he can make an immediate impact.
Marquette hired Wojciechowski in April to take over for Buzz Williams, who now coaches at Virginia Tech. Wojciechowski was a Duke assistant for 15 years under Mike Krzyzewski as well as a four-year player for the program.
Ellenson will join his brother Wally on the Golden Eagles' roster.
- Will Green