DOB: 28 December 1991
From: Ormond/Sandringham Dragons, Selection 34 2009 National Draft
Games: 120* (to end 2019)
A 207cm ruckman, the tallest ever to go through the AFL draft camp, Gawn missed the Under 18 championship due to a knee reconstruction but was snapped up by the Demons in the hope that his size and mobility would make him a weapon similar to Fremantle's Aaron Sandilands. Gawn returned to football with Casey late in the VFL season but suffered another knee injury in his third game back which ended his year prematurely.
Making his senior debut midway through the 2011 season in the absence of an injured Mark Jamar, becoming the fourth tallest AFL player on record, Gawn impressed in four matches but with Jamar returning he found it hard to break into the side again and played out the year with Casey.
Gawn suffered a knee injury during a training session in December 2011 and was forced to undergo surgery which kept him out of the 2012 season. He returned in 2013 with some encouraging performances, but was used primarily as a forward behind top ruckman Mark Jamar. A hamstring injury delayed Gawn's 2014 campaign, and when he returned he again played as an understudy to Jamar or as a forward. His season ended prematurely in the second quarter of the Round 23 match against North Melbourne when he suffered another knee injury. That year he won the Casey best and fairest award.
After struggling to break into the senior side in 2015 he eventually made the first ruckman job his own, forcing Mark Jamar out and becoming the side's top ruckman. In 2016 he played every game, being named the All Australian ruck.
His 2017 season was restricted to 13 games by a serious hamstring injury. In 2018 he returned to play every game for the season, breaking the AFL record for the most hitouts in a season and being named All Australian for the second time. While his side's form dropped off in 2019, Gawn remained one of the standout players of the competition. He played all but one game and was recognised for his leadership in an otherwise tough season with a third All Australian nomination.