The Nationals have agreed to a deal with veteran lefty Patrick Corbin, according to Chelsea Janes of the Washington Post (via Twitter). Corbin, a client of ISE Baseball, has landed a $140MM guarantee over a six-year term, Jon Heyman of Fancred tweets. Patrick Corbin | Matt Kartozian-USA TODAY Sports Deferrals will reduce the true, present-day value of the deal, but it’s still a huge sum. Joel Sherman of the New York Post tweets that the deferrals will be relatively minor, though details aren’t yet known. There will not be an opt-out opportunity in the deal, Bruce Levine of 670thescore.com tweets....