Rob Manfred envisions more speed-up experiments for baseball games

Rays relief pitcher Enny Romero (left) is pulled from the game during the 13th inning of a game on Sept. 13, 2015. Commissioner Rob Manfred is looking at more experiments to speed up the pace of the game. (Luke Johnson/AP Photo)NEW YORK - Rob Manfred envisions more experiments with speed-up rules, such as limiting pitching changes and trips to the mound, or requiring each pitcher to face multiple batters.

Speaking at the Sports Diversity & Inclusion Symposium on Wednesday, the new baseball commissioner said he doesn't see any need to expand the designated hitter to the National League. Manfred also expects teams and the players' association to discuss possible changes to September call-ups…