Would Nick Castellanos or Marcus Semien be good Mets fits?Former Mets reliever and SNY contributor Jerry Blevins weighed in on Castellanos and Semien10/20/2021, 5:25 PMDanny AbrianoManager of Editorial ProductionSep 6, 2021; Bronx, New York, USA; Toronto Blue Jays second baseman Marcus Semien (10) hits a grand slam home run in the ninth inning against the New York Yankees at Yankee Stadium. Mandatory Credit: Wendell Cruz-USA TODAY Sports / Wendell Cruz-USA TODAY Sports