Dodgers. After getting huffy when J.D. Drew did nothing more than exercise a right in his previous contract -- staying for half the money would have been nothing short of idiotic -- they recovered nicely from their mini-tantrum. They enhanced their rotation by taking advantage of Jason Schmidt's well-known requirement to remain on the West Coast, Randy Wolf's generous offer to come home for a year and Nomar Garciaparra's stated interest in staying home. A fading Luis Gonzalez is no Drew, but their pitching and speed makes them the clear NL West favorite.
Improvement: 7 wins.
Heyman also forecasts a seven-win improvement for the Giants. No other NL West teams made the list of "teams that will show the most improvement from 2006 to 2007."