For 1983 Holmes returned with Doug Shierson Racing to drive the No. 30 Domino's Pizza March 83C-Cosworth. During the year Holmes got a best finish of fifth at the Cribari Wines 300K at Laguna Seca Raceway. Holmes also competed in the Indianapolis 500 (sanctioned by USAC, but counted for points by CART), starting 12th and finishing 6th. Holmes finished 13th in the CART standings and 9th in the USAC standings.