Freestyle. The freestyle stroke involves the use of muscles in your hands -- the thenars -- and arms -- the biceps and triceps -- to help you glide through the water smoothly. In one motion, your entire body is engaged in the forward action of the freestyle move.
The likelihood of a pitcher completing nine innings if he throws an average of 14 pitches or less per inning is reinforced by the totals of the 89 games in which pitchers did actually complete nine innings of work.
Since most  major league games average between 250 and 300 pitches, that would  put the ball count at about 40 or 50 balls used per game.  According to the MLB: It says between five and six dozen  baseballs are used during each baseball game, as many as 72 balls..