4 Mets pitching prospects performed well in AFL, including 2020 bullpen option Ryley GilliamThe Arizona Fall League features some of the best prospects in baseball11/6/2019, 2:11 PMMar 17, 2019; West Palm Beach, FL, USA; New York Mets relief pitcher Ryley Gilliam (81) delivers a pitch in the eight inning of a spring training game against the Washington Nationals at FITTEAM Ballpark of the Palm Beaches. Mandatory Credit: Sam Navarro-USA TODAY Sports / Sam Navarro