MELBOURNE, AUSTRALIA - FEBRUARY 24: Taylor Adams (left) Daniel McStay of the Magpies celebrate during the 2023 AFL match simulation between the Carlton Blues and the Collingwood Magpies at Ikon Park on February 24, 2023 in Melbourne, Australia. (Photo by Michael Willson/AFL Photos via Getty Images)

Collingwood key forward Dan McStay is expected to miss the entirety of the 2024 season after scans uncovered a severe ailment.

The former Brisbane goalkicker sustained a ruptured ACL in his left knee, just days after returning to training from the MCL strain that kept him out of the Magpies' premiership triumph.

McStay suffered the devastating setback during a training session on Friday.

Collingwood Executive General Manager of Football Graham Wright released a statement on behalf of the Pies on Friday afternoon.

"This is unfortunate news for Dan, who is likely to miss the 2024 season," Wright stated.

"Dan sustained an anterior cruciate ligament injury during today's training session. He had returned to training this week after recovering from a medial ligament injury sustained in our Preliminary Final last season.

"We are all extremely disappointed for Dan, and our entire Club will rally around him during this difficult time and throughout his rehab journey."

Collingwood said it would release a further update on McStay's condition when one becomes available.