Athletics transferred LHP Brett Anderson from the 15-day disabled list to the 60-day disabled list. The move clears a spot for Dan Otero on the 40-man roster. Anderson has been shut down for four weeks due to a navicular stress fracture of his right foot last month and was scheduled for a checkup Friday. He wasn't likely to be ready by July 1 anyway, so the roster move shouldn't have an impact on his timeline.