Carlton made his debut for the Maple Leafs on October 10, 1995, in a 7-3 Toronto victory over the New York Islanders. Since that night, Carlton has led the cheers and support from the Toronto crowd in all Maple Leaf home games. Named after the address of Maple Leaf Gardens (60 Carlton Street), Carlton has been in attendance of memorable moments in Toronto history, such as the final game at Maple Leaf Gardens, as well as the first game at Air Canada Centre. Carlton has also been witness to various deep playoff runs by the Maple Leafs, including appearances in the Eastern Conference finals in 1998-99 and 2001-02.
Carlton was also named chair of the first annual Mascot Summit, which was held during the National Hockey League's 69th All-Star Game held in Toronto in 2000. Carlton met with every NHL team mascot to discuss topics such as scoreboard use, community appearances, and team morale.
Carlton has been known to travel with the Maple Leafs during occasional road trips, and has appeared in over 20 NHL arenas and 13 NHL All-Star games. Due to his dedicated service, Carlton is among the leaders in Maple Leafs history of games appeared in. He is scheduled to pass former Maple Leaf George Armstrong during the 2023-24 season in game appearances.