The Dodgers have signed free-agent infielder Aaron Miles and asked for unconditional release waivers on right-handed reliever Mike MacDougal. MacDougal was designated for assignment last Thursday when Ronald Belisario was activated. He will be granted his release on Sunday if he is not claimed off waivers. MacDougal rejected a Minor League assignment. MacDougal, 35, was signed to a one-year deal for $1 million, with a 2013 option, after being one of the most pleasant $500,000 surprises last year.