In martial arts, he specializes in kung fu, has been a champion at some tournaments, and has been the featured subject of several documentaries that have aired on PBS.

[8] In 2003, he was an All Around Grand Champion in the Adult Male Traditional category at the UC Berkeley Chinese Martial Arts Tournament.

[10] He would return in 2014 for another PBS-broadcast documentary called Shaolin Kung Fu Monks where he follows the group as they go on a worldwide tour with stops in Moscow, New York City, and Los Angeles.

[13] He voices Marco Diaz, a teenage boy whose family hosts the title character as an exchange student, and who becomes her partner in their adventures.

[15] McArthur was involved in theater throughout high school and college, and has worked at ComedySportz in Los Angeles as part of their improv team.