A standout open side flanker who consistently leaves everything on the field for the Green and White often finding himself with the highest tackle count in the competition. Considered one of the fittest flankers in the country, he won the Hurricanes' gruelling surf to peak race two years in a row breaking the franchise record both times. Callum achieved his first full Super Rugby contract in 2015 with the Hurricanes, playing in 12 games.
- Position: Flanker
- Number of Manawatu Games: 58
- High School Club: Inglewood High School
- Manawatu Club: Varsity
- Nationality: New Zealand
- Date of Birth: 14 September 1988