 Marcum went 3–4 for the Blue Jays in 2006 in 21 games, including 14 starts, with an earned run average (ERA) of 5.06.In his final seven starts, he had a record of 2–1 with a 3.31 ERA.Marcum had a breakthrough season in 2007, going 12–6 with a 4.13 ERA.