Mets' Brodie Van Wagenen expects Edwin Diaz to be closer in 2020: 'He's a crucial part, he's a key part'Diaz lost his closer role in 2019 as he had a disastrous season11/13/2019, 5:35 PMJul 23, 2019; New York City, NY, USA; New York Mets relief pitcher Edwin Diaz (39) pitches against the San Diego Padres during the ninth inning at Citi Field. Mandatory Credit: Brad Penner-USA TODAY Sports / Brad Penner