From aces to closers, pitchers will be on the move this month.Teams trying to make a push for the postseason are always looking to add new arms. There are some big names available on the trade market who can make a difference in the starting rotation or bullpen.Here are 10 pitchers - five starters and five relievers - who could be changing uniforms before the July 31 non-waiver trade deadline:COLE HAMELS: The MVP of the 2008 World Series and NLCS has been through this before, going from the Phillies to the Rangers in July 2015.