Teams that remain in the playoff hunt can still improve their roster over the next two weeks.
According to Joel Sherman of the New York Post, a number of high-profile relievers have cleared trade waivers.
Addison Reed (Diamondbacks), Fernando Rodney (Mariners), John Axford (Rockies), Edward Mujica (A's) and David Aardsma (Braves) can all be had via trade.