The Dodgers already have Howie Kendrick at second base but he's currently sidelined due to a hamstring injury. Therefore, left-hand-hitting Utley will take over at the keystone during Kendrick's absence. Upon the latter's return, Utley will probably go to the bench (but could get some time at third base, too).

This was a necessary move for the Phillies, as Utley was one of the final remnants of their 2008 World Series championship squad. In Sweeney, Philadelphia lands a legitimate candidate to take over at second base for Utley (perhaps even right away). He will also add more speed to the lineup. He has good upside. Richy is also a quality prospect with a good arm and plenty of projection. This was an absolute steal for the Phillies.

Utley better have something left in the tank for the Dodgers, because they gave up two quality prospects for him. While Sweeney and Richy see their fantasy stock rise after the deal, Utley's is in decline (especially if he winds up on the bench).