Jaren Jackson Jr. is one and done.

The Michigan State forward on Monday announced he will forgo his final three years of eligibility and enter the NBA Draft after just one season with the Spartans.

"Spartans, this was not an automatic decision. And honestly, thank you for making it one of the toughest decisions I’ve ever had to think about," Jackson said in a statement. "While playing in the NBA was always my dream and desire, I did not know the opportunity would present itself in quite this way. I’m ready to live my dreams and I cannot pass it up. Therefore, the time has come to declare for the 2018 NBA Draft. 

"Even though I will no longer play for MSU, I will ALWAYS be a Spartan! I will finish my studies and I will kiss the Spartan helmet on the Breslin court."

Jackson added that he intends to sign with an agent in the near future.

A 6-11 forward, Jackson, 18, led the Spartans with 3.03 blocked shots per game and ranked third on the team with 5.8 rebounds per game this season. He also ranked fifth on the team in scoring with 10.9 points per game and set a school record by blocking 106 shots during his freshman year.