Rakell was 19 when he made the Anaheim Ducks' opening-night roster for the 2012-13 season. Anaheim's first-round pick (No. 30) in the 2011 NHL Draft averaged 8:57 of ice time in four games before the Ducks returned him to Plymouth, his junior team in the Ontario Hockey League.
He split the 2013-14 season between Anaheim and Norfolk of the American Hockey League, playing in 18 NHL games and earning his first point with an assist in a 6-2 victory against the Buffalo Sabres on Nov. 8, 2013. Rakell made his NHL playoff debut on April 23, 2014, when he dressed for Game 4 of the Ducks' Western Conference First Round series against the Dallas Stars. He scored his first NHL goal in Anaheim's 6-2 victory in Game 5 and finished with a goal and an assist in four playoff games.