However, he has made more trips to a trio of schools, including a Sunday visit to Notre Dame to meet with coach Brian Kelly and other members of the coaching staff.
"If he has a favorite right now, he's doing a very good job of not disclosing it publicly," Warren Central coach John Hart said. "I know he's had numerous visits to Michigan, and to Notre Dame.
"I know he's supposed to take a trip to Iowa, he's going to take a trip to Florida, he's going to take a trip to Oklahoma. He's going to LSU and Auburn in late July. He's been to Virginia Tech a few times."
Hart added the 6-foot-2, 275-pound Day, who is rated No. 8 in the nation among defensive tackles by Scout.com, will use Notre Dame, Michigan and Virginia Tech as barometers when judging the schools he will visit.
"He's going to make sure he makes a great decision, and I think he really, really, really likes what he's seen to this point," Hart said. "It's going to be up to those schools that he's visiting to make him feel like they're a better fit than those three schools he's seen a lot."
Sunday's visit to South Bend, Ind., was Day's latest visit, and it was scheduled with a purpose.
"He was going to go Saturday, but coach (Brian) Kelly wasn't in," Hart said. "He wanted to personally have a discussion with coach Kelly."
An aspect the coaches of Warren Central impress on their players is the importance of developing a strong relationship with their potential position coaches in college because those are the coaches players spend the most time with during their careers.
"It's the position coach you play for, and that can change, but I think that has to be the No. 1 thing," Hart said. "He's the guy you're with all the time. Is it somebody you feel like is going to make you a better person?"
Notre Dame's defensive line coach is Mike Elston.
"(Day) and coach Elston have gotten to know each other very, very well," Hart said. "I know that coach Elston also knows mom and Sheldon's brother real well. I think those are all important components to know."
While Day has the ability to make such a decision because of football, Hart stressed there will be much more involved in the process.
"Sheldon has a very strong faith, he feels very strong about family and appreciates academics," Hart said. "He knows the football part is reason why there is interest from all these schools, and those three components are probably equally as important as the fourth (football)."
At this time, Day is telling the Warren Central staff he wants to take official visits before making a decision.