Colorado State head coach Jim Mora said defensive coordinator Tyson Summers was 'no longer with the program' after he was relieved of his playcalling duties in the first half and left the sideline.
Mora made the statement following the game, confirming Summers' immediate departure from the program.
The decision came after Summers was pulled from playcalling responsibilities early in the contest.
He then exited the sideline, prompting Mora to address the situation publicly.
No further details were provided by Mora regarding the specific reasons for the removal or departure.
The move marks an abrupt end to Summers' tenure as Colorado State's defensive coordinator.
The team did not announce an interim replacement or timeline for a permanent hire.
Summers had been in charge of the defensive unit and playcalling prior to his removal.
The game in question was played on Saturday, though the opponent and final score were not detailed in the source.
Mora's comments were the only official confirmation of the personnel change provided.
This article synthesizes reporting from ESPN. Top story: "Colorado State defensive coordinator leaves sideline, fired after game" (ESPN).