While employed there through 2007, his workload mainly consisted of college football, the X Games, and IndyCar, which included the role of lap-by-lap announcer for ABC's coverage of the 2005 Indianapolis 500.
Harris was also given high profiled jobs with Hall of Famers Keith Jackson and Dan Fouts on the ABC college football game of the week.
He, and broadcast partner Todd Richards received high marks for their coverage of Shaun White's Gold medal final run in Pyeongchang, South Korea at the 2018 Olympic Winter Games.
Harris has also acted as host for the Tour de France and the network's coverage of the annual IronMan event in Kailua Kona, Hawaii.
Starting in 2021, Harris splits the lead commentating duties with Leigh Diffey doing Supercross on NBCSN with Ricky Carmichael, Daniel Blair, and Will Christien.