In the 2009 AFL Season, Dangerfield changed his guernsey number from 19 (retired in order to assist the launch of the club's "19th Man" campaign) to the number belonging to former Adelaide captain Mark Ricciuto, 32. In that year he became a regular in the Crows' senior side, with his style of play likened by fans and commentators to Ricciuto. He received an AFL Rising Star nomination in round 3 for his performance against Fremantle at Subiaco Oval, Dangerfield recorded, 20 disposals, 1 goal, 5 inside-fifties, and 5 clearances in the game. Dangerfield played in 19 of the 22 games during the home-and-away season, averaging 13.0 disposals and 1.0 goals a game. Dangerfield played in two finals, recording 11 disposals and 2 goals in the Crows 96-point win over Essendon in an elimination final, the following week Dangerfield recorded 16 disposals and 2 goals in a 5-point loss to Collingwood in the semi-finals. In the 2010 AFL Season, Dangerfield continued to develop his game, only missing two games for the entire season. He increased his disposal average to 15.7 and continued to average a goal a game, kicking 26 goals for the season. Dangerfield had his best game of the season in a 22-point victory over the West Coast Eagles in round 15, recording 23 disposals, 1 goal, 7 inside-fifties, and 6 clearances.