Mickey Callaway's unique message to Mets seems to have workedCallaway wanted his team to embody the mindset from a certain book5/11/2019, 9:02 PMApr 22, 2019; New York City, NY, USA; New York Mets manager Mickey Callaway addresses the media at a press conference prior to the game between the New York Mets and the Philadelphia Phillies at Citi Field. Mandatory Credit: Andy Marlin-USA TODAY Sports / Andy Marlin