I've heard he is, but it's still a gamble for a cash-strapped team that already has Z and Soriano on the books long term, a good number of high-ceiling prospects almost ready and four average to above average to good starters already. Keep in mind, this is only the third great season for Lee, before that he was posting what Z's done this year or worse. Also interesting: Lee xFIPs the past three years: 3.57, 3.69, 3.22 Demp xFIPs the past three years: 3.74, 3.81, 3.98 Lee has been better, and much moreso this year. But is it significant enough to shell out a 4/72 or more deal? Simply above average is probably more accurate. Out of contenders, they're ahead of the Phillies, Padres, Rays, Cardinals, Yankees and Reds in WAR. They're behind the Braves, Twins, Giants, White Sox, Red Sox and Rangers. So perfectly in the middle of contenders in pitching WAR. Fangraphs won't let me separate rotation from relievers, however, so I don't know if that'd increase their standing around the league. For rotation xFIP, the Cubs are behind the Cardinals, Phillies, Twins, Braves and Padres. They're ahead of the Rays, White Sox, Red Sox, Giants, Yankees, Rangers and Reds among contenders. That puts them sixth among 13 teams (including the non-contending Cubs). That's slightly above average. There's little reason to expect much, if any, of a dropoff next year, though.