"After talking things over with my family and some of my teammates, I decided the timing was right to make the move because I believe that I'm ready to play at the next level," said Sims in a statement release.
"I think I can impress the pro scouts with my end-line blocking and provide a big target over the middle. With my size and athleticism, I can create mismatches in the passing game against linebackers and safeties.
"Coach Dantonio has built a great football program at Michigan State. He is a great coach and an even better person. Coach D has a solid nucleus of players returning, plus he'll bring in a talented recruiting class. He also has surrounded himself with great coaches and they'll develop a plan to get the job done next season."
For Mark Dantonio the news of the loss of a second player was hard, however, he also feels the Spartans proven track record with tight ends will help Sims during the coming months.
"Despite missing nearly three full games, Dion Sims still earned second-team All-Big Ten honors," said Dantonio. "So that says something about his production. He's a big target with great hands. With his combination of size and power, Dion is difficult to bring down, so he gains a lot of yards after the catch. He's also a much improved run-blocker.
"Although we'll miss Dion in our offense next season, he felt the timing was right and we wish him all the best in his future. Since returning to Michigan State, our offensive system has helped develop two tight ends that are currently playing in the NFL, in Kellen Davis (Chicago Bears) and Garrett Celek (San Francisco 49ers), so there's a proven track record of our players having success at his position at the next level."