Boumann was drafted in from Box Hill as part of a trade deal with Greater Western Sydney and, at only 22, after a few fruitless years on the Western Bulldogs' list.[3]
Boumann made his debut in round 1, against Collingwood. After a game against St Kilda, he reported stomach pains. Boumann had surgery to remove his appendix.[4]
Boumann later injured his hand in a fight outside a city nightclub on 22 July 2012. Boumann has told club officials he punched one of his attackers in self-defence, fracturing his hand. Police have begun investigating the incident, which occurred near the corner of Exhibition and Lonsdale streets as Boumann and a friend tried to hail a taxi about 2.45am. Boumann says he was kicked repeatedly. Two men were arrested and questioned about 45 minutes later.[5]
Boumann was announced delisted by the Hawks as of the 12 October 2012.[6]