Patton, a free agent, was suspended for the first 25 games of last season following a failed drug test for Adderall, which is an amphetamine banned by baseball unless a player has a therapeutic use exemption. That was Patton's second failed test.
The left-handed reliever pitched in just nine games for the Orioles in 2014 before he was traded to the San Diego Padres in May in exchange for catcher Nick Hundley. Patton made just eight appearances for the Padres before he landed on the disabled list with shoulder soreness.
He was eventually transferred to the club’s 60-day disabled list, then designated for assignment in September instead of added to the Padres’ expanded roster. Patton cleared waivers and was outrighted to Triple-A, but he elected to become a free agent at the end of the season.
Patton’s suspension would begin the first regular-season game he is eligible to play in after signing a major league or minor league deal.