Thornton said he told coaches about his decision before leaving Boulder. Grossnickle said he thought through his option on his drive home and called special teams and tight ends coach Kent Riddle as soon as he got home.
"It just felt right, being in-state and local," Grossnickle said. "I just think I just needed about an extra hour to think about it."
Thornton said the opportunity for early playing time in Boulder was too appealing to pass up.
"It was just the right atmosphere," Thornton said. "When the offensive coordinator said I can come in and do some things right now with where I'm at right now, it was just the place I see myself being and fitting in right away and having a good career."
Grossnickle is the 10th ranked kicker in the nation and a three-star prospect. Thornton is ranked the 104th best tight in the nation by Scout.com and is a two-star prospect.