In 1973, Major League Baseball changed forever. Following a year when the American League recorded a batting average of .239, the AL instituted the designated hitter rule, allowing a team to place a hitter in the batting order instead of forcing the team’s pitcher to step up to the plate. Since that season, there has been an imbalance between the AL and the National League — which still requires a spot in the batting order for the team’s pitcher. Now, more than 40 years later, talks of making the two leagues consistent have begun to heat up once again. “It’s...