The Washington Nationals have made yet another change to their bullpen. Following Tuesday's loss against the Minnesota Twins to begin that three-game set, the Nationals decided to option struggling reliever Andre Granillo to Triple-A Rochester after he gave up four earned runs across two innings pitched. In his place, Washington announced they called up Zak Kent to their MLB roster. If Kent appears in a game for the Nationals, he will be the 23rd pitcher that has thrown a pitch for the team this season. That would be third-most in the majors, which is a clear sign that both the coaching staff and front office continue to search for answers in that unit . Zak Kent Given Opportunity to Earn Role With Nationals Washington Nationals new pitcher Zak Kent | Matt Krohn-Imagn Images Kent was claimed off waivers from the Minnesota Twins on May 3 after he was designated for assignment.…