For the campaign, Shields returned to the Angels bullpen. He pitched 22 consecutive shutout innings from May 9 to June 11, and worked three scoreless innings five times during the season. With fellow reliever Francisco Rodríguez, he was part of the first pair of relievers to post 100 strikeouts in one season since , and was third in the American League in strikeouts with 109. In the post-season that year, he struggled in two appearances during the ALDS, pitching three innings and allowing two earned runs with a 6.00 ERA.