Born in Bayshore, California, Michael Lewis is a veteran of American sports car competition. He began racing in 1979 in SCCA competitions, taking four national championships.
After a lengthy spell in Trans-Am racing, Michael switched to the American Le Mans Series in 2003 in the LMP 900 class. His best finish that year came at Laguna Seca with a fourth in class and fifth overall.
Racing in 2004 for Autocon Motorsports he finished 7th overall at Sebring sharing with Tomy Drissi and Vic Rice. Lewis then suffered an accident on the 12th lap of the Petit Le Mans, retiring the car for the balance of the season
In 2005 he ran well at Sebring until retiring with mechanical failure on lap 202. Had a season best finish at Portland, with fourth in P1 class behind an Audi and two Dyson Lolas. He was fourth again in the LMP1 class at Road America, seventh overall. At the Petit Le Mans the team completed 350 of 394 laps to take fourth place in LMP1 class, trailing both Audis and No. 20 Dyson Lola.
At Sebring in 2006, driving with Bryan Willman and Chris McMurry they retired after after 121 laps but then earned a podium finish at Mid-Ohio with McMurry. At Lime Rock, they took second place in LMP1 after leading the race from laps 43 to 52.