O'Donoghue ruptures knee ligaments.We wish all four the best with their ongoing recoveries.
Magnus Okuonghae is out with an Achilles rupture and Drey Wright with a knee ligament rupture, whilst Tosin Olufemi is expected back in February after an Achilles rupture in pre-season.
Michael joins the growing list of absentees on the long term injury list this season for the U's.
"Unfortunately for him, he's picked up this injury as he twisted in training and is likely to be out for the rest of the season now."
"Michael has been in the squad since the Barnsley game and was in strong contention again for the trip to Yeovil," boss Tony Humes said.
Michael sustained the injury in training on Tuesday, and subsequent investigations have confirmed the U's worst fears.
Young U's defender Michael O'Donoghue is set to miss the rest of the season after rupturing his knee ligaments in training.