3:24pm: The Marlins will have to trade for Willis if they want to acquire him, according to Clark Spencer and Manny Navarro of the Miami Herald. Willis would prefer to play closer to the West Coast, so it seems unlikely that he would sign with the Marlins if he becomes a free agent.
Arizona's interest was reported yesterday by Nick Piecoro of the Arizona Republic, with agent Matt Sosnick noting that Willis would like to play there. Andy Martino of the New York Daily News wrote that the Mets were not interested in Willis, while Capozzi termed the Marlins' interest in a reunion as "mild." Today is the first we've heard of the Brewers. At any rate, it appears that the 28-year-old southpaw will be traded rather than released.