Blake Ferguson is set to make his boxing debut on the undercard of next Wednesday night's bout between Anthony Mundine and Shane Mosley at Sydney Entertainment Centre.

Ferguson, who was sacked by Canberra before the end of the NRL season, is being mentored by his Mundine, who is his second cousin.

Donning the gloves: Blake Ferguson (L) with his cousin Anthony Mundine. Credit:Brendan Esposito

The 23-year-old NSW Origin star is yet to find an NRL club and is unlikely to have a contract registered by the NRL for the start of next season.

He has been training with Mundine and will debut at heavyweight level on the undercard of his bout against Mosley, the seven times world champion who has been in Sydney for two weeks preparing for the fight.