Shawn Chacon of the Astros got a no-decision in his start today against the Dodgers. Chacon has now pitched in eight games this year, all starts and has nary a win or loss on his ledger. The only other pitcher to start that many consecutive games from the beginning of the season without getting a decision in any of them was Dick Stigman of the 1965 Twins.
However, Stigman went 4-2 in 25 relief appearances for the Twins that season and Stigman was just a spot starter throughout the season for the Twins. Stigman started just eight games in 1965.