The Mudville baseball game was close, with the score 2 to 4 in the bottom of the last inning. The crowd began to lose hope as two batters were out. Their hopes rested on Mighty Casey coming to bat, as he was their best hitter. However, when Casey's turn came, he struck out swinging on three pitches, disappointing the crowd. The poem uses the baseball game and Casey's failure to teach a lesson about not relying too much on heroes.