NLL Hossack was selected second overall in the 2015 NLL Draft by the
Rochester Knighthawks. He made his professional debut on January 9, 2016, where he scored twice. He finished the season second among rookies with 91 loose balls and was named to the All-Rookie team. In his second season, Hossack was a finalist for the NLL Defensive Player of the Year Award and was named All-League Second Team. He then won the Defensive Player of the Year and first team All-League for the first time the following two seasons. Ahead of the 2020 season, the Knighthawks moved to
Halifax, being rebranded as the
Halifax Thunderbirds. Hossack continued his dominance, once again winning the Defensive Player of the Year Award and being named First Team All-League. In September 2021, The Thunderbirds re-signed Hossack to a five-year contract. Hossack was the runner-up for the 2023 NLL Defensive Player of the Year Award and was named first team all-NLL.
MLL Hossack played 3 seasons in
Major League Lacrosse for the
Atlanta Blaze.
PLL Hossack decided to enter the
Premier Lacrosse League Entry Draft in 2021, having not played professional field lacrosse since 2018. He was selected second overall by
Archers Lacrosse Club. As a close defenseman, Hossack was named an All-Star, and at the end of his first PLL season, was named the Dave Pietramala Defensive Player of the Year. At the 2025 PLL All-Star Game, Hossack set a PLL record for the fastest recorded shot at 123 miles per hour. == International career ==