Giants well aware of their second-half slouch

As long as you limit the conversation to 2007 and 2011, when they won the Super Bowl, then sure, the Giants are great closers. Otherwise, their second-half slumps are real, and in their heads. Under coach Tom Coughlin, the Giants are 53-19 in the first halves of seasons, just 27-38 in the second halves. “I’m…