Plus: Umm… John Carlson scored a goal? Minus: The Caps had six power play chances and somehow came out -1 in goals-for with the man advantage. It doesn’t help their own penalty kill let up a goal as well, so they went -2 in special teams. Key Moment: Right before the Rangers took a 3-1 lead, the Caps had a couple grade-A chances but Igor Sheshterkin came up huge. So instead of it being…