The 21-year-old was opposed to dangerous Lion onballer Nigel Lappin and successfully curbed his influence on the contest.
Selwood - drafted with pick 53 at the 2002 draft - made his debut back in round 19 2003, against Adelaide, but remains eligible for this year's award because a chronic groin complaint limited him to just three games last year.
Those problems appear to be well behind the Bendigo Pioneers product, however, as he has managed to put together 13 games so far this season.
The honour comes just a week after his twin brother Troy, who plays for Brisbane, was nominated.