On this episode, Mark Simon takes a break from talking defense (mostly) by welcoming in Sean Smith. Sean, a former consultant for the Blue Jays, is the inventor of the WAR you see on Baseball-Reference.com and the author of the new book, War In Pieces, a documenting of how he put it together and an explanation of how it works. The book's chapters are short and not hard to understand, with lots of pertinent historical examples.Sean talked about the impact the stat has had within base...