MLB fans react to pitcher Matt Harvey's decision to call it quits after former Mets star ends decade-long MLB career: The Dark Knight was a dog
Matt Harvey gets a standing ovation on his return to Citi Field : r/baseball
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Former MLB pitcher known as 'The Dark Knight' announces his retirement after nine seasons
Dark Knight returns: Harvey, Orioles lose to Mets 7-1
Matt Harvey - Wikipedia
Matt Harvey announces retirement
Dark Knight returns: Harvey, Orioles lose to Mets 7-1
The rise and fall of the Mets' talented former rotation - Newsday
Dark Knight returns: Harvey, Orioles lose to Mets 7-1