Safety Jamal Hicks will miss the remainder of the regular season and receiver Bisi Johnson is likely out for two to three weeks, CSU football coach Mike Bobo said Monday.

Both players were injured Friday night during the Rams’ 27-24 win at New Mexico.

Linebacker Max McDonald, also injured in that game, is undergoing the standard protocol for players who have suffered possible concussions, Bobo said. His status for Saturday’s home game against Air Force will be determined by team doctors and trainers based on how he responds to daily tests.

Two other players who were injured at New Mexico, cornerback Shun Johnson and defensive lineman Darnell Thompson, are fine and should play this week, Bobo said at his weekly news conference. Johnson injured an ankle in the final minutes and had to be helped off the field, while Thompson twice left the game with injuries but returned each time.

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Hicks, a sophomore from Gardena, California, broke his right arm in the first quarter and will have surgery this week, Bobo said. He’ll definitely miss the remainder of the regular season, the coach said, but could possibly return to play in a bowl game.

Colorado State University (6-2, 4-0 Mountain West) has qualified for a bowl game for the fifth straight season, regardless of the outcome of the Rams’ final four regular-season games.

Hicks has shared the starting job at strong safety with senior Jake Schlager this season, with each player starting four of the first eight games and both playing about the same number of plays.

Johnson, a junior from Lakewood, sprained a medial collateral ligament in his knee while blocking downfield for fellow receiver Warren Jackson late in the third quarter and had to be helped off the field. He’s the Rams’ second-leading receiver with 27 catches for 385 yards and one touchdown. He’s also CSU’s punt returner.

Bobo said Johnson was “highly doubtful” for Saturday’s home game against Air Force (3-4, 2-2) but wouldn’t completely rule him out.

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Senior Detrich Clark, the Rams’ starting slot receiver with 27 catches for 355 yards and four touchdowns, was held out of the New Mexico game with a shoulder injury based on an evaluation of how he performed in pregame warmups, Bobo said. He’s “questionable” for this week’s game, the coach said. Trey Smith, a junior receiver who missed three games with a foot injury earlier this season, has played on special teams the past three games and could see some action on offense this week.

The Rams’ depth will be tested more this week than at any other time this season, Bobo said.

“That’s why you practice; that’s why guys get reps,” he said. “We’ve got to get the right guys in the right spots, and we’ve got to figure out how we’re going to put them on the field this week and execute our game plan.

“But I don’t know the answer to where everybody’s going to be and who everybody’s going to play yet.”

McDonald, a sophomore out of Rocky Mountain High School, suffered a possible concussion in the second half of the game and did not return. He’s started the past four games at weak-side linebacker, taking over the spot when senior Kiel Robinson was injured in a Sept. 16 loss at Alabama. Robinson returned to the starting lineup at New Mexico, playing the strong-side linebacker position against the Lobos’ triple-option offense.

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Hicks and McDonald were both key cogs in CSU’s defense vs. the option. Hicks had a team-leading five tackles when he left Friday’s game, and McDonald took over the lead and had six tackles when he suffered his injury.

Air Force also runs a triple-option offense.

“A lot of yesterday and last night and then this morning has been about personnel,” Bobo said. “As a coach, you’re figuring out how you’re going to align your personnel to give you the best chance to be successful. You’ve got some guys out, so you’ve got to think about moving some personnel around to put people in position where we can be productive and execute offensively, defensively and special teams.”

Follow reporter Kelly Lyell at twitter.com/KellyLyell and facebook.com/KellyLyell.news and listen to him talk CSU sports at 11:35 a.m. Thursdays on KFKA radio (AM 1310).