Following college, Ah You was drafted in the 17th round of the 1972 NFL Draft by the NFLNew England Patriots. Ah You spurned the Patriots and the NFL, opting to join the CFL Montreal Alouettes prior to the start of the 1972 CFL season. According to a 2007 interview, Ah You joined the Alouettes in part due to the Patriots' desire for him to play the linebacker position, rather than Ah You's natural position at defensive end: Ah You played defensive end with the Alouettes for nine seasons, helping the team win two Grey Cup championships in 1974 and 1977. Ah You won the Grey Cup Most Valuable Player in the 1974 championship game, and was a CFL All-Star in two seasons. He helped recruit Clifton Alapa and Eletise Fiatoa to the Alouettes. Following his final season with the Alouettes in 1981, Ah You was lured by George Allen to play in the United States Football League, where Ah You played 2 more professional football seasons. In 1983, he suited up with the USFL's Chicago Blitz and then was traded to the New Orleans Breakers prior to the 1984 campaign. In 1985, Ah You finished his career with the Arizona Outlaws retiring mid-season on April 22, 1984. Ah You retired after the end of the 1985 USFL season with the Outlaws, who were then coached by Ah You's former college coach, Arizona State coach Frank Kush.
Post football and personal life
Ah You is a member of the Hawaii Sports Hall of Fame. He is currently a prominent citizen of Laie, Hawaii. Ah You currently devotes his time to community activities such as the "Junior Ah You Basketball Tournament" and the "Junior Ah You Christmas Football Bowl." Ah You's nephew C.J. Ah You played for the University of Oklahoma and was selected in the seventh round of the 2007 NFL Draft by the Buffalo Bills. Nephew Jonathan JT Mapu played for the University of Tennessee and was a free agent with the Washington Redskins. Nephews EJ Reid and Tori Taulogo played for Utah State University. EJ Reid is a free agent with the St. Louis Rams. Nephews "The Tuiasosopo Brothers" Eldon and Isaiah Tuiasosopo. Eldon plays for Dixie State University and Isaiah Tuiasosopo Austin Peay State University in Clarksville, Tennessee. Nephew Matt Ah You played at BYU from 2004 until 2008. Ah You's brother Charles lettered at BYU. Ah You's sons, Kingsley and Harland also played at BYU. Sons, Miki Junior and Quin played for Dixie State College and son Joshua played in Arizona for Mesa Community College. Ah You also runs a restaurant in Kahuku named Tita's Grill. Currently, Ah You, with his son Kingsley, co-owns and operates a company and website that showcases local Hawaiian high school, youth, and amateur sports.