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.
The average lifespan of a ball in the MLB is 6 pitches, IIRC, and the average number of pitches per game is 275. This is somewhere around 46 balls per game - obviously dependent on factors for each individual game. Side Note: Home teams are required to have 90 balls ready to go for each game, I think.