Curses

Curses is a short story in The Dresden Files series by Jim Butcher. It is set between Small Favor and Turn Coat. It can be found in the book Naked City.

Plot
A man in an expensive suit walks into Harry Dresden's office to hire him to remove the Billy Goat curse from Wrigley Field, and Dresden accepts. With Bob's help, he realizes that the curse is of non-human origin and has been maintained since 1945, when a guy called Sianis got thrown out of Wrigley Field for bringing in a smelly goat.

Legwork brings Dresden to the Llyn y Fan Fach Tavern, where he engages in a flirty banter with the Jili Ffrwtan barmaid, who agrees to accompany him to the caster of the spell, the king of the Tylwyth Teg, who is a baseball fan, and had in mind to attend the 1945 game, under the guise of a goat. Dresden and Gwynn ap Nudd depart friendly, and Dresden reports to Donovan the the curse will not be removed.

Dresden and Gwynn attend the next Chicago Cubs game, musing that, loyalty, participation and sportsmanship are worthier than money.