Miller worked for 33 years at "The Indianapolis Star", becoming one of the nation's best known sports writers for Indy car racing. He started covering the Indianapolis 500 in 1969. During the month of May for the Indy 500, in addition to his daily columns, Miller would have side gigs on WNAP-FM, WIBC, WTHR, and "The Bob & Tom Show". In the early 1990s, he also served as emcee of the popular Last Row Party. Miller also wrote and reported occasionally about NASCAR, including extensive coverage of the Brickyard 400. Following the 1996 open wheel split, Miller was highly critical of the Indy Racing League and Indianapolis Motor Speedway president Tony George. For this, he drew considerable ire from many locals and from various city leaders, but likewise gained a considerable following from CART supporters. However, he typically stopped short of directly criticizing most of the actual IRL drivers and crew members, explaining that most were hard-working and passionate about their sport, and merely intermixed in a political situation that was largely out of their control. He lost his radio show on WIBC and television job at Channel 13 for his anti-George stance. Eventually, after the department reorganized, Miller's duties shifted from columnist to focus solely on auto racing.