available; many batters will often attempt to deliberately foul off pitches that are strikes yet difficult to hit well, by hitting them into foul territory, awaiting an easier delivery later in the at-bat. Since an uncaught foul ball cannot be a third strike (unless it was a bunt attempt), this tactic allows the batter to receive more pitches. Because foul balls require runners to return to their bases, a foul ball on two strikes means that the game situation does not change whatsoever; this is in contrast to cricket, wherein the time/delivery limits in the game mean that legal deliveries that are not struck with the intent to score can hurt the batting team, as they are left with fewer deliveries in the remainder of the game to try to score off of. In the early generations of baseball, the emphasis was mostly on bat control, place hitting, bunting, etc. But, starting in 1919, several factors resulted in a dramatic expansion of strategic orientation, supplementing traditional "small ball" with the "power game": a "livelier" ball, because of better materials and a tighter weave; more frequent substitutions of new balls; lighter, more flexible bats; the outlawing of the spitball; and the increase in attendance which drove owners to build more outfield seating, thus reducing the outfield area significantly. The power game has been encouraged further in recent years, by the construction of new ballparks with smaller outfields than previously, and even the reduction of field size at "classic" ballparks known for spacious outfields; for example, the distance to the fence in deep left field at the original Yankee Stadium was reduced from between 1984 and 1988 (the post-1988 dimensions were maintained at the current Yankee Stadium). Still, it is generally agreed that no one can hit a home run at will, and every successful batter knows never to go to the plate intending to hit a home run. Rather, he should attempt a level swing, try to pull only the ball on the inside of the plate, go the other way with balls low and outside, and otherwise start each at bat intending to drive the ball up the middle, which is the most vulnerable part of the infield (especially if the pitcher is not particularly good at fielding his position). Which directions a batter may be incentivized to hit the ball in: In cricket, the boundary behind the striker's wicket