Veteran lefty reliever Randy Flores signed with the Padres last February, inking a minor-league contract because he saw the potential opportunity to return to the majors. However, that contract came with a May 15 opt-out date in case Flores hadn't yet been promoted. So when the deadline came and went without a promotion, Flores declared himself a free agent.
One of the interesting things about Randy Flores is that, for a lefty reliever, he isn't that effective against lefties, as they've batted 43-for-146 off him in the bigs since 2008, with 31 strikeouts and 20 walks. But veterans are veterans and Flores even has some playoff experience, so it won't be a surprise to see him pitching in the Bronx this summer.