Hawthorn have secured the services of young ruckman Ben McEvoy from St Kilda in exchange for midfielder Shane Savage and the No.17 draft pick overall.
McEvoy, 24, played all 22 games this season for the Saints and held down the No.1 ruck role.
"He has elite endurance, is very strong overhead and is a high quality ruckman," Hawthorn's recruitment manager Graham Wright said.
"At only 24 years old, Ben is already one of the competition's premier ruckmen and we believe he still has significant improvement to come."
McEvoy's signing follows the retirement of Max Bailey, who played in the Hawks' premiership win over Fremantle.
Savage played 15 matches for Hawthorn this season and was an emergency in the title decider.
"Shane is an exciting player who brings pace and penetration to our midfield. At 22, he is approaching his prime and will add another dimension to our developing midfield group. We look forward to him embarking on a long career at St Kilda," Saints coach Scott Watters said.