Despite playing just 15 rounds of the regular season, Trbojevic's incredible performances, combined with Nathan Cleary's injury problems saw him wrap up the award with a round to spare.
He beat home Nathan Cleary, who was five votes behind at the end of Round 24, with votes following that not announced.
Trbojevic becomes the third Manly player to win the medal following the great Cliff Lyons and Matt Orford.
Trbojevic said he wasn't sure if the award would ever sink in.
"I'll start off by saying what an honour it is to win this award. I was just reading through the past winners, and to be recognised amongst that list is amazing and I don't think it'll ever sink in," Trbojevic said upon receiving the award.
"What the NRL and Queensland government have done over the past three months has been remarkable.
"To the Manly boys. To Dessy (Des Hasler), Chez (Daly Cherry-Evans), and the playing group, this medal is a beneficiary of your hard work."