Career
Register made his professional debut on January 25, 2012, playing defence for the Allen Americans of the Central Hockey League in a 2-0 home game shut-out over the Arizona Sundogs. On February 22, 2013, the Manchester Monarchs of the American Hockey League (AHL) signed Register to a one-year AHL contract and then loaned him to the Ontario Reign of the ECHL where he skated in 17 regular season games and 10 playoff contests during the 2012-2013 season. On July 3, 2013, the Ontario Reign re-signed Register for the 2013-2014 ECHL season.
On June 10, 2014, Register signed a one-year contract with Hungarian club, Alba Volán Székesfehérvár, competing in the Austrian Hockey League (EBEL).
Prior to the 2014-2015 season, Register was released from his contract and returned to North America, in accepting a try-out to the Chicago Wolves AHL training camp. On October 1, 2014, Register agreed to return to the Reign in signing a standard player contract.