The players in the baseball lineup wear uniform numbers 1, 2, 3, 4, 5, 6, 7, 8, and 9.

Each of the uniform numbers of the first four batters totals 21.

Batting between players 1 and 2, are players whose uniforms total 18.

Between players 2 and 3, the uniforms total 24.

Between 3 and 4, the total is 14, and

Between 4 and 5, the total is 9.