In 2007 he was drafted in round 9 (#175 overall) by the
Mississauga IceDogs in the
Ontario Hockey League Priority Selection. Following his NCAA career, Calof continued his playing career signing with top Swedish club,
Skellefteå AIK of the
SHL. During the
2014–15 SHL season, Calof recorded 16 goals and 19 assists, gaining him attention for the
SHL Rookie of the Year award. After three seasons with Skellefteå AIK, Calof signed with fellow SHL club,
Växjö Lakers on a one-year deal on April 10, 2017 playing a role in
Växjö's
2017–18 SHL championship. Following the successful campaign with the Lakers, Calof joined
Torpedo Nizhny Novgorod of the
KHL for the
2018–19 season. After spending the
2019–20 season with
Traktor Chelyabinsk, Calof opted to return to Sweden for a second stint with Växjö Lakers. After claiming a second championships with the Lakers during his two season stint, Calof left the SHL and signed a one-year contract with German club,
Schwenninger Wild Wings of the
Deutsche Eishockey Liga (DEL) on May 18, 2022. However before joining the club, Calof terminated his contract with the Wild Wings in order to sign a lucrative one-year contract to return to the KHL with
Amur Khabarovsk on August 1, 2022. In the
2022–23 season, Calof made just 16 appearances with Amur in registering two points before opting to terminate his contract with the club on December 9, 2022. He would later join as a free agent Swiss club,
Lausanne HC of the
National League (NL), signing for the remainder of the season on February 16, 2023. On March 13, Lausanne HC announced that they would not re-sign Calof. ==Career statistics==