Three-batter minimum for pitchers, universal DH among MLB rule changes being discussed: ReportThe league and players' union have exchanged proposals on these changes2/6/2019, 3:10 AMBaseball Commissioner Rob Manfred gestures while speaking during a Major League Baseball owners meeting on Tuesday, Feb. 20, 2018 in Glendale, Ariz. (AP Photo/Ben Margot) / Ben Margot/AP