The Hawks beat the Western Bulldogs to Impey's services, with Impey, 22, leaving Alberton despite having a year to run on his contract. He has signed a three-year deal with Hawthorn.

Port received picks 33, 61 and the Hawks' fourth-round selection in next year's draft, while Hawthorn acquired this year's pick 67 in addition to Impey. Hawthorn's earliest pick in this year's draft is now No. 43, having traded away 2017 first and second-round picks last year to land Jaeger O'Meara from Gold Coast.

Impey requested a trade to Waverley despite being close friends with Jackson Trengove, who joined the Dogs from Port as a free agent. Impey played 75 games in four seasons with Port Adelaide, including 20 games this year. Dropped late in the season, he was recalled for Port's elimination-final loss to West Coast. He kicked 15 goals in 2017, including a career-high four against the Brisbane Lions in round six.

Hawthorn recruiting and list manager Graham Wright said the Hawks were rapt to have gained Impey. "We are really pleased a deal could be reached with Port Adelaide and look forward to welcoming Jarman to the Hawks," Wright said.

"His outstanding speed and endurance will be a really valuable asset and his ability to play at both ends of the ground is a great advantage.

"Jarman is a competitive character, who goes hard at the footy, which makes him an exciting acquisition and a terrific addition to our list.

"At only 22 years of age, Jarman has plenty of football ahead of him and we can't wait to see what he can produce in the brown and gold."

Port list manager Jason Cripps wished Impey well. "Jarman has been a strong contributor to the team and played some exciting football in a variety of roles," Cripps said.

"Although it's disappointing to see him go, we understand the reasoning behind his decision and wish him the best for the future."

Drafted from the Murray Bushrangers at pick 21 in 2013, Impey made headlines late last year after crashing into parked cars after leaving a party, fleeing the scene. Port banned Impey from round one of the 2017 season and he was subsequently convicted and fined $700 by a South Australian court.