[1] Hassler is an Alberta native having attended Holy Trinity Academy in the southern foothill town of Okotoks.

In his rookie year as an Osprey, he appeared in seventeen matches and notched 8 tries earning him a spot on the RaboDirect Dream Team.

During his stint as a Huskey, he was selected to represent Team World in the 2010 IFAF International Federation of American Football game vs the USA.

Hassler signed with the Ospreys in 2013, and extended his stay with a three-year deal that would see him as a member of the club until the end of the 2017 campaign.

Despite having multiple season ending injuries during his time with the Ospreys Hassler's tough style of play never wavered to the delight of his fans.