First you don't use a definite article here, you would say "About Major League Baseball.
In the game of baseball, the teams altenate, one team going into the field and the other team batting. The batting team attempts to make hits (hitting the ball thrown by the pitcher) before the fielding team can put three players out (to put a player out means to touch him with the ball while he not standing on one of the three bases, or to catch the ball when he hits it, before it touches the ground).
If a player goes completely around the infield, stepping on first base, second base, third base and then back to "home plate," where the batter stands, and where he was when he hit the ball, then he scores one point for his team, and that is called a run. So, to score twelve runs on 14 hits means that the Cleveland Indians performed very well. They were able to convert their 14 hits into twelve points. There are a number of ways this could have been accomplished, but no matter how it was done, to score twelve runs, to get twelve points, from 14 hits indicated superior play of one kind or another. I haven't seen the box scores (the record of the game), so i can't tell you how they accomplished this, but take my word for it, they did very well.