Five options Mets can tab to replace Jason Vargas, including Dallas KeuchelThe Mets cannot send Vargas out for his next start. Or the one after that4/14/2019, 5:25 PMOct 16, 2018; Houston, TX, USA; Houston Astros starting pitcher Dallas Keuchel (60) delivers a pitch in the first inning against the Boston Red Sox in game three of the 2018 ALCS playoff baseball series at Minute Maid Park. Mandatory Credit: Troy Taormina-USA TODAY Sports / Troy Taormina