Roster review in Colorado continues as Buffaloes landed on coveted running back Alton McCaskill II on the transfer portal on Tuesday.

McCaskill announced his intention to transfer from Houston in April after sitting out the college football season 2022 with a knee injury.

Alton McCaskill carries the ball

Houston Cougars running back Alton McCaskill, #22, carries the ball during the TicketSmarter Birmingham Bowl between the Houston Cougars and the Auburn Tigers on December 28, 2021 at Protective Stadium in Birmingham, Alabama. (Michael Wade/Icon Sportswire via Getty Images)

He was the fifth best player available on the portal, according to The Athletic.

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McCaskill was a star freshman in 2021, rushing for 961 yards and 16 rushing touchdowns as the Cougars finished 12-2.

His 16 rushing touchdowns were the most by any freshman in the nation.

He missed the entire 2022 season recovering from an injured knee, but was expected to be a standout running back in 2023 as the Cougars enter their first season as a member of the big 12 conference.

His addition to the Buffaloes is just the latest shakeup in Colorado as Deion Sanders prepares to enter his first season in Boulder.

Alton McCaskill takes on the Navy

Houston Cougars running back Alton McCaskill, #22, looks for space to run on a second half draw play during the football game between the Navy Midshipmen and the Houston Cougars at TDECU Stadium on September 25, 2021 in Houston. (Ken Murray/Icon Sportswire via Getty Images)

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Sanders has completely overhauled the roster, with 57 players entering the transfer portal since Sanders became head coach, according to a school spokesperson.

Beginnings of May, Colorado athletic director Rick George. supported Sanders as he tries to build a winner in Boulder.

«I have confidence in him and his staff, and they know what they’re doing,» George told ESPN after the Pac-12 spring meetings. «He’s been very honest and direct. He’s been very open about it in public and in private. He’s trying to build a winner in Colorado, and this is his way of doing it.»

Deion Sanders' coaches during the Spring Game

Colorado head coach Deion Sanders plays for fans in the first half of the team’s spring practice NCAA college football game on Saturday, April 22, 2023, in Boulder, Colorado. (AP Photo/David Zalubowski)

Sanders made it clear from the moment he stepped foot on campus that changes to the program were on the way.

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In his first meeting with the returning players, Sanders told them to «go ahead and jump into that [transfer] portal» while bringing players with him from Jackson State.

Sanders also added 2024 four-star recruit Aaron Butler on Tuesday.

Butler told USA Today Sports that he intends to play wide receiver in Colorado.

«It was also a great decision to know that I have the opportunity to go for more than 1,000 yards,» Butler said.