One of Collingwood’s brightest young prospects has had his pre-season stalled by illness.

Callum Brown, the club’s second selection in the 2016 National Draft, is suffering from glandular fever.

He is likely to spend the coming weeks on the sidelines as he recovers and returns to full health.

“Callum had a sore throat late last week and struggled a bit through training,” General Manager of Football Geoff Walsh explained.

“He was subsequently diagnosed over the weekend and has returned a verdict of glandular fever.

“He will be away from the club at least for the whole week and then once his bloods have returned and he’s feeling back to normal and OK, the medical team will make an assessment from next week onwards.

HIGHLIGHTS: Brown's junior best.

“It will obviously take him out of the mainstream program for a few weeks. We will just see how he progresses from there.”

Brown, 18, is the son of 1990 premiership hero Gavin. He was an All-Australian at Under 18 level last year and had previously represented the Eastern Rangers in the 2015 TAC Cup Grand Final.

“It’s a bit of a blow for him because he has been training well and looking good for a young fella in his first pre-season,” said Walsh.

Those with a Magpie mind will know that Brown is not the first draftee to suffer from glandular fever during their first pre-season.

Tim Broomhead was laid low by the same condition in 2013, as was captain Scott Pendlebury back in 2006.

GALLERY: Brown and Daicos' family flashbacks.