Update, 5:43pm: Susan Slusser reports that Trevor Cahill will go on the 15-day DL with LEFT shoulder soreness.
UPDATE, 5:17PM: Susan Slusser reports "Jack Cust designated for assignment it very much appears." Wow.
Update, 5:04pm: Landon Powell sent down. This would imply Jake Fox gets a spot because the A's need a backup catcher.
Updating, as of 4:57pm: No official announcement of the 25-man roster yet but:
Andrew Bailey says his knee locked up on him but he will ready on Opening Day.