Here's your headline from today's New York Times: "Mussina's 20th Victory May Be His Last." The story notes that the 2008 Yankees ace has an expired contract, a 40th birthday celebration in December, and a family that wants him home for good. (He's also, of course, the oldest guy to win 20 who hadn't before, and stops being the guy with the most wins to never win 20 in a season. Whatever.) Now, here is the list of pitchers who voluntarily retired in the last 100 ...