As the Kansas football team gears up for its Big 12 matchup against TCU tomorrow , the Jayhawks updated their availability report Thursday evening. Only one update was made from the previous day's injury listings, but the downgrade is significant enough to alarm Jayhawk fans.

Quarterback Isaiah Marshall, who was previously designated as probable, is now questionable. Coming off a huge 25-24 walk-off win over Baylor , this certainly isn't a development the KU faithful want to hear a little over 24 hours before kickoff.

Thursday availability report.

Isaiah Marshall is now questionable. He was listed as probable last night. pic.twitter.com/0VHXYtlkd3

— Michael Swain (@MSwain247) October 30, 2026

Versus the Bears, there were no indications that Marshall was dealing with anything other than the normal physical wear-and-tear he's faced all year.…