The Mets will go for their fifth win in seven games tonight behind the newly recalled Claudio Vargas after whipping the Nationals on Tuesday with the help of Ryan Church’s torrid bat. The Mets, now 20-17, could use a hot streak with the Marlins and Phillies playing so well. In the notebook, we chronicle the Mets’ various machinations to get Johan Santana the start Friday at Yankee Stadium, as well as update you on Nelson Figueroa, Jorge Sosa and Luis Castillo.