The Ontario club has sacked Paul Mariner and are expected to unveil New Zealand national team captain Nelsen on Tuesday.
35-year old central defender Nelsen has been a mainstay in Harry Redknapp’s R’s side this season but it appears as though he will hang up his boots to focus on management.
“He is a massive part of your team (but) he wants to be a manager and it is a chance for him to manage a club,” Redknapp told reporters this week.
“He has been fantastic. I took him to Tottenham last year from Blackburn. He’s one of the best pros I’ve ever met in my life, a fantastic player, a great trainer, a leader.”