After three years in 1997-1999 with first generation Indycar chassis (IR-7, IR-8 and IR-9), Dallara introduced a new second generation model chassis for the 2000 season, named the IR-00. G-Force with GF05 car and Riley & Scott with Mk VII car were two other new generation Indycar manufacturers. In 2000, Lazier first drove the No. 91 Riley & Scott Mk VII-Oldsmobile for Hemelgarn Racing. At the season-opening Delphi Indy 200 at Walt Disney World, Lazier started in 5th place and led for 47 laps and finished in 2nd place. At the second race of the season, the MCI WorldCom Indy 200 at Phoenix, Lazier started in last 26th place, having missed qualifying. He first took the lead on lap 151 and led through lap 155 when Robbie Buhl took the lead. Lazier then retook the lead on lap 161 and led the remaining 40 laps to win his first race since the 1997 VisionAire 500. Lazier became the first driver to win an IRL race after starting in last place. At the Indianapolis 500 the Riley & Scott was replaced by the Dallara IR00 for the remainder of the season. Lazier was 2nd in the Indy 500 and in Midas 500 Classic at Atlanta Motor Speedway and won the Belterra Resort Indy 300 at Kentucky Speedway. He became the series champion and an only one driver, won more than a single race that season.
|2000||Indy Racing League|
|Buddy Lazier||91||Hemelgarn Racing|
|Dallara IR-00||Oldsmobile||Delta Faucet / Coors Light / Tae-Bo|