[2] Hossack played for the Whitby Warriors of the Ontario Junior Lacrosse League, where he won the Minto Cup in 2011 and 2013.

Hossack attended Lindenwood University where he played four seasons of Division II lacrosse as an LSM.

In his second season, Hossack was a finalist for the NLL Defensive Player of the Year Award and was named All-League Second Team.

Hossack continued his dominance, once again winning the Defensive Player of the Year Award and being named First Team All-League.

[7] Hossack was the runner-up for the 2023 NLL Defensive Player of the Year Award and was named first team all-NLL.