It is becoming increasingly hard to score bunches of runs, beyond the 5th inning, because you face a bevy of power-armed beauties, coming at you one after the other! If a guy gives up two bleeder singles he gets the hook. So the single, single, double, singe, 3 run rally is now walk and a jack for two runs! Nobody nickels and dimes a Chapman to death!!! But if you get out in front of his cruise missile, you can send it for a ride!
On the chart above, there was basically a flatline trend throughout the Moneyball era, but that has changed dramatically, and had begun to by the time Moneyball was a movie in '11.
Young power bats, K's be damned, and one-inning Bob Fellers are now all the rage. Consider the Gonzo for Tank trade, made by the best run franchise in sport. Even the Cards seem to be following the masses!