Jason Mantzoukas (Greek: Ιάσων Μαντζούκας) is an American character actor, comedian, writer, and podcaster. He is best known for his recurring role as Rafi in the FX comedy series The League, and as one of the three co-hosts of the podcast How Did This Get Made? Alongside Paul Scheer and June Diane Raphael. Mantzoukas has also appeared in the films The Dictator, Sleeping with Other People, They Came Together, Conception, and John Wick: Chapter 3. He has had recurring roles on three TV shows created by Michael Schur: Parks and Recreation (as Dennis Feinstein); Brooklyn Nine-Nine (as Adrian Pimento); and The Good Place (as Derek Hostedtler). He also voices the characters Jay Bilzerian in the Netflix animated series Big Mouth, Alex Dorpenberger in the HBO Max animated series Close Enough, and Rex Splode in the Amazon Prime animated action series Invincible. He is known for often playing "crazy, funny weirdos".