The Macedonia (Ohio) Nordonia defensive end camped in East Lansing on Sunday and was elated to earn the offer.
"I was very excited (about the offer)," Alexander said. "I thought it went pretty good and I tried to give 100 percent in everything. … "I'm always a critic of myself, so I didn't think I had done that much, but evidently I was doing way better than I thought I was doing. I was very proud."
He certainly had done enough, as he was told by his high school coach, Jeff Fox, to call Michigan State coaches, who then offered him.
"I can't even put it into words," he said. "It made my day. I was just stunned."
The 6-foot-6, 237-pound 2015 prospect holds offers from a few MAC schools, so Michigan State was the first big offer for him. He said the feedback was good from defensive line coach Ron Burton, while he also learned plenty on Sunday.
"He was showing me how to improve my pad level," Alexander said. "He showed me some moves that will benefit me and good moves for someone with a long wingspan like myself."
Sunday also gave him the chance to interact with Michigan State defensive linemen like Shilique Calhoun, who gave him more advice, while talking about the defensive fronts MSU runs.
"I watched them more and more and know they have a couple of fronts," Alexander said. "I talked with the players there about the fronts they used. I liked the fronts they use and I like the whole school entirely."
With the environment and atmosphere good, as he described it as "friendly," Michigan State is a place Alexander said he definitely could see himself playing.
He now will camp at Pitt and Tennessee, while planning to wait to make a decision.
"I was truly going to wait until after my senior season because I want to focus on helping my team out because we want to win state and focus on a that," he said.