But a recent influx of offers, and plans for official visits, have caused the longtime Broncos pledge to open things up.
"Marcus has decided to open up his recruitment," said his father Richard.
But that doesn't mean the Broncos are out of it.
"Boise State is absolutely still in it for Marcus," said his father. "He just wants to take a look at all of his options."
"Arizona State was the first school to offer him, and they've always been very good and cordial with Marcus so he's going to take a visit there," said Richard Rios.
Nebraska offered over the weekend, and the Huskers are likely to get an official visit in the very near future.
In addition, Cal and USC have been schools' Rios has shown an interest in and he'd like to get offers from them.
"He'd like to hear from USC a little more, and Cal's location makes them a school we'd like to know more about," said his father.
In the meantime, Rios still maintains regular contact with the Broncos coaching staff, namely head coach Chris Petersen and defensive backs coach Marcel Yates.
"We talked last week (to Boise State," said his father. "Marcus spoke to Coach Pete and Coach Yates. They explained to him the great coaching and his opportunity to play early and they would be there if if needed."
Last week, Rios was selected to the Semper Fidelis All-American Bowl.