Even the so-called greatest fans in baseball can become unhinged during the worst of times.

Reeling from the reported loss of free-agent outfielder Jason Heyward, one St. Louis Cardinals fan lit his jersey on fire in protest of Heyward's unexpected eight-year, $184-million deal with the Chicago Cubs.

Heyward is the second Cardinals free agent to jump ship this winter to the division rival Cubs, after pitcher John Lackey signed with Chicago.