Career
Jeffries made his World Cup debut in 2001, with his best finish coming in 2004, when he teamed with George Grey (skier) to finish 9th in team sprint at Lahti. Jeffries competed in three events at the 2006 Olympics in Turin. His best individual showing came in the 50 kilometres, where he finished 58th.
He also was a part of the Canadian team in the relay, which finished 11th.