Before he was an NBA champion with the Golden State Warriors, Draymond Green was a star at Michigan State. This week, he went back to his roots.

In a video posted on the Michigan State basketball Twitter page, Green worked out with the Spartans and even slammed down a dunk in transition.

Green played at Michigan State from 2008-12, where he was a consensus All-American and B1G Player of the Year in 2012. He helped the Spartans to a Final Four appearance in 2010 and a 29-8 record in 2012.

The Warriors selected Green with the 35th overall pick in the 2012 NBA Draft, and he played a pivotal role in the Warriors’ dominance from 2014-19, winning 3 titles and setting an NBA record with 73 wins in 2015-16. On an individual level, Green was the 2017 NBA Defensive Player of the Year.

Imagine going up against that in practice.

Michigan State opens its season on Nov. 9 against Kansas.