The ball magnet was declared the WAFL club’s best player for the season ahead of Jay van Berlo and Laine Rasmussen, who tied for second at the awards night on Friday.
Sandover medallist Aaron Black finished third, while fellow midfielder Rohan Kerr took fourth.
Nelson tied for the award with defender Andrew Strijk last year but edged out Van Berlo and Rasmussen by a vote to be the sole winner in 2014.
It capped off a prolific season for the 21-year-old in which he averaged just over 31 possessions a game and fell only one vote short of winning the Sandover Medal.
Nelson places himself in stellar company as a consecutive Breckler medallist, with tough backman Dion Fleay the most recent to achieve the feat in 2006-07.
Rigoll won the award in 1998-99 and Fong in 1982-83.
But West Perth legend Mel Whinnen sets the benchmark with four-straight medals from 1970 to 1974 as part of an unmatched nine club fairest and bests.