Bush was arrested for driving under the influence and leaving the scene of an accident earlier this spring. The 26-year-old spent last season at Double-A, posting a 4.83 ERA with 13.8 K/9 and 4.3 BB/9 in 50 1/3 innings of relief. The Padres selected him first overall in 2004.
Players on the restricted list do not count toward a team's 25-man or 40-man roster. They do not accrue service time and they don't always get paid.