The Royals were told that the five-game suspension that Herrera appealed held. The two-game suspension Herrera appealed was reduced to one.
Herrera received a five-game suspension for throwing a pitch behind Oakland's Brett Lawrie on April 19. He received a two-game suspension for his part in an altercation with the White Sox on April 23.
Jeffrey Flanagan is a reporter for MLB.com. Follow him on Twitter at @FlannyMLB. This story was not subject to the approval of Major League Baseball or its clubs.