MacArthur completed his high school studies at Deerfield Academy. After this, he joined Bowdoin College to pursue a Bachelor’s in Government. To pursue his interest in acting, he later enrolled in Groundlings Theater Company and Atlantic Theater Company, too.
He made his feature film debut with Homo Erectus, portraying Thudnik. However, he is most widely known for playing Jay Geils in Angie Tribeca. His other acting credits also include Go On, Worst Week, A Haunted House 2, Being Frank, and others. He also made guest appearances in popular shows like How I Met Your Mother and Happy Endings.
—via yahoo movies
as Paul
as Finn Cooper(8 eps)
as Bill Turner
as Mark(1 ep)
as Eric (uncredited)
as Sean Quinn(8 eps)
as Marlon Tate(1 ep)
as Greg Anderson(11 eps)
as Stan
as Chester
as Xander Fogerty(1 ep)
as Mountie Podien
as Reed
as Jay Geils(30 eps)
as Charlie(1 ep)
as Ned
as Zac(1 ep)
as Self - Guest(1 ep)
as Rafe
as Rick Massella(1 ep)
as Barry Foster(1 ep)
as Officer Cook
as Thrasher (voice)
as Wyatt(7 eps)
as Dale Beaumont
as Leslie Jenkins
as Chuck O'Connell
as Jack(1 ep)
as Thrasher (voice)
as Walter(1 ep)
as Lance(2 eps)
as Steven(1 ep)
as Rex(13 eps)
as Peter Novak
as Ron
as Thrasher (voice)
as Digdug O'Shaughnessy
as Tony Gilbert
as Buddy Amicus(1 ep)
as Kyle Cooper
as Thudnik
as Jimmy the Bartender
as Curt(2 eps)
as Randy Pilgrim(1 ep)
as Levinson(1 ep)
as Doorman(1 ep)
as Ed(1 ep)