Trystan Castillo’s college career is officially over.

On Tuesday, the Missouri redshirt junior offensive lineman announced that he’ll be leaving the Tigers and declaring for the NFL draft. Castillo has been a three-year starter at center for Missouri.

Castillo made the announcement with a message on Twitter:

Missouri is entering a period of change, as it fired head coach Barry Odom and will be seeking his replacement over the next few weeks.

Now, the Tigers will also be moving forward without one of their top offensive linemen.

Castillo, who is listed at 6-foot-4, 315 pounds, could be a solid draft prospect for NFL teams to consider as he has a lot of starting experience in the SEC, one of the most competitive conferences in the country.