* MisaimedFandom: There are a lot of fan works out there that rewrite the ending of the poem to have Casey hit the ball, never mind that the structure of the poem is like a classical tragedy where Casey's FatalFlaw is choosing not to hit the first two pitches out of pride, bringing his strikeout on himself.
** One such fan work, "Casey's Revenge" by legendary sportswriter Grantland Rice, acts as a sequel to the original. Casey's climactic strikeout marks the start of a prolonged batting slump for him, whereas the pitcher who struck him out goes on a tear and becomes the talk of the league. When said pitcher's team returns to Mudville--with the pitcher, not the home team, as the marquee attraction--he and Casey find themselves in a similar situation to their earlier duel (last out of the game, multiple runners on base, Casey as the winning run, two strikes against him) but this time Casey comes through with a tape-measure home run.
--->"But no one ever found the ball that mighty Casey hit."
* WhatAnIdiot: Casey decides to be slick and let the first two pitches fly rather than hit them, confident he can hit the last ball. The thing is, there's a reason why batters get three strikes instead of just one.