text: if a baseball umpire realizes he made a bad call, can they reverse the decision?   umpires can and will reverse a call if they realize they made a mistake, several times over the past and present seasons i have seen the umpires gather together to discuss the call and sometimes they will change it and make the right call if it's agreed by the group that it needs changed. it is very hard to change a call on a bang, bang play. the umps have to make their best judgment call and leave it at that.