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Although Mullings plays 10 miles from Boston College at Milton (Mass.) Academy, the Wolverines were the first to move on the 6-foot-2, 200 pounder with an offer.
And Mullings, who plays running back and outside linebacker, showed his interest with a visit to campus over the weekend.
"It was great," Mullings said. "It's a big university, and everything about it was great, and they strive for excellence there, which is something I enjoy and I love. Their plans for the future and everything they're doing for the program is amazing."
Mullings also holds an offer from Boston College, and he will visit Stanford in early June. Rutgers, Duke, Wake Forest and Maryland are also in contact and trying to get Mullings to visit, but the one to Palo Alto, Calif., is the only one set.
"So far I've heard all great news from Stanford," Mullings said. "Some of the kids from my school who have graduated got looks from Stanford, got offers from Stanford, and they said it was a great place. I feel like it is a place I want to check out."
However, it is clear Michigan made a huge impression.
From the academic presentation to the approach of the coaching staff, the presence of coach Jim Harbaugh and the style in which Michigan practice, Mullings was left with a ton of positive thoughts.
"They have a system that allows everybody to play, everybody to get reps," Mullings said. "They have their first string and third string guys practice for two hours, then their second string and fourth string guys come out for two hours.
"It shows they care about everybody getting better and improving and being the best you can possibly be."
Mullings met with Harbaugh, running backs coach Jay Harbaugh and defensive coordinator Don Brown, who possesses strong ties in New England from his days as a Boston College assistant coach.
"The academic support there is just top-notch, just really good. It's amazing," Mullings said. "They all seem like great coaches and great men. You may look at it and say, 'Oh, it's Jim Harbaugh,' but at the end of the day he's a football coach who just loves football. And that's what I love."