King committed shortly before returning home from his visit to see Texas State.
"Yes sir, I committed," an excited King told JCFootball.com. "I have a great chance of starting my first year and I'll be playing both outside/slot, getting end arounds and other stuff like that.
"They have an honest coaching staff and I have a great relationship with coach (Mike) Schultz. I feel needed and very wanted there."
King chose TSU over heavy interest from the likes of Georgia State, Utah State, Tennessee, San Diego State, Toledo and Hawaii.
As a redshirt freshman this past season, King led the Vaqueros with 54 tackles, 637 yards and seven scores.
He will be talking with the Texas State coaches as well as his academic advisers at SBCC to get things squared away and if he can leave this summer, he will have three years to play three.
If he needs to return and play this fall, King would have two to play two following the 2015 football season.