During spring training in , Thomas expressed his confidence about his team's chances for the upcoming season. Thomas hit his first home run of the season against the Red Sox on April 5, in a 10–2 Blue Jays win. The following day, with the bases loaded and a 2–2 tie, Thomas hit a grand slam off Red Sox reliever Manny Delcarmen, leading the Jays to a 7–4 victory. On April 19, before a game against the Detroit Tigers, manager John Gibbons benched Thomas. Thomas expressed his frustration about the decision, and vowed that his career would "not end like this."