Union head Michael Weiner treated for brain tumor

Published August 21, 2012 2:57pm EDT | Updated November 20, 2014 6:35pm EST

NEW YORK – Baseball players' union head Michael Weiner is undergoing treatment for a brain tumor.

The union said Tuesday that he began treatment a day earlier. The union anticipates he will continue to work from its New York office on a daily basis.

Weiner, 50, succeeded Donald Fehr in December 2009 to become just the fourth head of the union since 1966.