 In his MLB debut, on September 16 at Parc Jarry, he drew the starting assignment against the Chicago Cubs and pitched six shutout innings, allowing four hits but six bases on balls.Despite the baserunners, he left the game with a 1–0 lead and Montreal held on to win, 4–3, for Landreth's only Major League victory.Control issues plagued Landreth again in his next start six days later against the New York Mets, as he walked four in only 1 innings and allowed three earned runs; Landreth absorbed the loss as Montreal fell, 4–2.