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Cain will be the anchor at the top of the rotation again in 2013.
This starting rotation is simply better than any other one in the NL.
Matt Cain is a bona fide ace, a No. 1 who will again go about his business in 2013 and will only get better pitching in big games. Cain was not entirely dominant in the postseason (3.60 ERA and 20 strikeouts in 30 postseason innings), but don't look for that rend to continue going forward.
Madison Bumgarner won 16 games in the regular season and while he struggled with a 6.00 ERA in the playoffs, he is only a ripe 23 years old and will grow from the experience.
Projected No. 3 starter Tim Lincecum was about as dreadful as you could be in 2012, going 10-15 with a 5.18 ERA. The two-time Cy Young Award winner regained his confidence in the playoffs as a set-up man, compiling a 2.55 ERA in 17.2 innings.
According to USA Today's Joe Perrotto, manager Bruce Bochy said Lincecum will be in the rotation next year and look to regain his form.
And then there's No. 4 starter Ryan Vogelsong, a quality right-hander who won 14 games in 2012 and was simply clutch in postseason play. In 24.2 innings, Vogelsong went 3-0 with a minuscule 1.09 ERA.
Finally, the Giants round out the rotation with Barry Zito, a man most well-know for being absurdly overpaid when he signed a seven-year, $126 million deal with the Giants before the 2007 season.
As bad as the deal has been for the Giants, Zito finally made it worth it in 2012, winning 15 games and possibly the two biggest games of his career—an elimination Game 5 of the NLDS and Game 1 of the World Series.
The Nationals boast an excellent rotation with Stephen Strasburg, Gio Gonzalez, Jordan Zimmerman, newly-acquired Dan Haren and Ross Detwiler, but they've yet to prove it in postseason play.
The Cardinals have age and health questions to address with their rotation, while the Phillies have struggled to overcome the Giants in recent years.
From top to bottom, this Giants rotation is as good as any rotation in baseball and more than capable of putting together more great performances next October.