The Yankees have inquired about Roy Halladay, but the Blue Jays appear to be asking for too much - including either Joba Chamberlain or Phil Hughes. New York could offer outfielder Austin Jackson and catcher Austin Romine, two of the club's top prospects, but Toronto will certainly demand a top arm as well. "They are kicking the tires, but they don't have enough," said a source. The Red Sox, Brewers, Cardinals, Phillies and Yankees are believed to be the five teams most interested in Halladay.