The Phillies’ deep farm system makes them a popular favorite. They have a stronger farm system than in recent years, and the Phillies are not afraid to part with their prospects. The Blue Jays addressed they would like a shortstop. The Phillies could package Jason Donald in a deal. The Blue Jays had interest in Donald last year.
Also, the Blue Jays are unlikely to trade Halladay to a team within their division. That eliminates the Red Sox and Yankees, opening a door for the Phillies. The Blue Jays would be happy if he was out of the American League all together.
The only problem is that Halladay has a long list of teams he does not want to not play for. Ricciardi did not mention the teams, but there is always a possibility the Phillies are on that list.