The Padres acquired Stratton from the Pirates on Monday in exchange for right-hander Andrew Moore.
Stratton was designated for assignment a couple days ago by Pittsburgh, but the Padres were able to find a spot for him on their 40-man roster. Stratton, a 29-year-old righty, already went through this process earlier in the season when Atlanta DFA'd him, and he was then dealt to Pittsburgh for catcher Joey Bart. He's logged 32.2 innings in the minors and 3.1 innings in the majors this season.