I'd rank them...
All of them had drop-offs in production after the break...but exlcuding wins, Webbs numbers were better overall and should stay very good.
Sometimes a second year slump comes for pitchers after the hitters have a had a chance to get a few looks at them, but I wouldn't be too worried with Webb. His record after the break was horrible (3-7), but his era was still an excellent 3.33. His whip went went up to 1.28 compared to a 1.04 the first half as well. But strangely, opponents batted worse against him the second half and he struck out batters at a considerably higher rate. This implies he night have tried to overpower guys too much after the break, when he probably should've just tried to make hitters put that sinker of his in play like he did the first half. Anyway, I don't think Webb is in for a sophomore slump, and with the mediocrity of teams in the NL West, I'd expect him to increase his win total to around 15. His stuff is excellent.
Nomo is a close second on this list for me. He's a horse on the mound who eats up innings, gets his K's, and has a very good era. I'd put him ahead of Webb if he didn't start losing his location after the break last year (1.49 whip after the break
). But his consistency the last two years have allowed the Dogers to average 88-89 victories the last couple seasons.
Wolf fell apart after the break...5+ era, 1.5+ whip
Clemens moved to hitter friendly confines...and he's pretty darn old