Major League Baseball (MLB) honored its best relief pitchers with a Delivery Man of the Month Award for one pitcher during each month of the regular season from 2005 through 2013. The awards were initially part of a sponsorship agreement between MLB and package delivery company DHL Express; DHL's sponsorship ran from 2005 to 2010. There was also a Delivery Man of the Year Award; all of the Delivery Man awards were discontinued after 2013. A new Reliever of the Month Award was first awarded in 2017.

Major League Baseball (MLB) annually honored its best relief pitcher with the Major League Baseball Delivery Man of the Year Award from 2005 through 2013. It was initially part of a sponsorship agreement between MLB and package delivery company DHL Express; DHL's sponsorship ran from 2005 to 2010. There was also a Delivery Man of the Month Award. From its inception in 2005 through 2008, the award was given to a single reliever who was selected online by fans from a group of 10 finalists chosen by an MLB panel. The panel took sole responsibility to select the annual winner starting in 2009.