Devlin spent six years as the lead play-by-play voice of the NBA's Memphis Grizzlies, and three years for the Charlotte Bobcats. He has also done play-by-play for the NBA on TNT, NFL on Fox, Major League Baseball on Fox, and football and men's college basketball for Big Ten Network. For many years, he has provided commentary during the NBA Playoffs in the early rounds of the Western Conference. He has also hosted pre-game and post-game shows for the New York Yankee games on the MSG Network in the late 1990s during their World Series championship years.
Although technically employed by the Raptors organization, during the offseason he has occasionally served as a fill-in play-by-play announcer for both of the Raptors' broadcast partners, TSN and Sportsnet. This has included play-by-play for the CFL on TSN and for Sportsnet's coverage of the Rogers Cup (both in 2012), and for Sportsnet's Toronto Blue Jays coverage in 2013. In addition, in the fall of 2011, during the NBA lockout, Devlin hosted the pre-game and post-game shows for Toronto Maple Leafs games on Leafs TV. (The Raptors and the Leafs are both owned by Maple Leaf Sports & Entertainment, which in turn is primarily owned by the parent companies of TSN and Sportsnet.)