Dubin (elbow) elected to become a free agent Thursday, Roch Kubatko of MASNSports.com reports.
Dubin cleared waivers after being removed from the Orioles' 40-man roster but has opted for free agency rather than accepting an outright assignment to the minors. The right-handed reliever ended the season on the injured list with elbow discomfort, and it's unclear what his current health situation is.