 Later that year, he was among the umpires who submitted their resignations in a failed gambit by the Major League Umpires Association, and he was not among those later re-hired following union negotiations and litigation.During a period in which many umpires were criticized for their weights, Kaiser was the heaviest in the AL; he was listed at from 1983 through 1998.Apart from the unlikelihood that he maintained that precise weight for fifteen years, there are ample reasons to believe that his weight topped for much of that time.