Major League Baseball Commissioner Bud Selig says the league and players' union have previously discussed the idea of a blanket policy regarding domestic violence during collective bargaining, yet so far baseball has opted to handle any issue on a case-by-case basis.Major League Baseball commissioner Bud Selig, right, smiles while touring AT&T Park with San Francisco Giants executives Alfonso Felder before a baseball game between the Giants and the Arizona Diamondbacks in San Francisco, Thursday, Sept. 11, 2014.Major League Baseball commissioner Bud Selig, center, tours AT&T Park with San Francisco Giants owner Larry Baer, center right, and executives before a baseball game between the Giants and the Arizona Diamondbacks in San Francisco, Thursday, Sept. 11, 2014.Major League Baseball commissioner Bud Selig, left, tours AT&T Park with San Francisco Giants owner Larry Baer, center, and Giants executive Alfonso Felder before a baseball game between the Giants and the Arizona Diamondbacks in San Francisco, Thursday, Sept. 11, 2014.Major League Baseball commissioner Bud Selig smiles while speaking at a news conference before a baseball game between the San Francisco Giants and the...