It's certainly a risk to put your eggs in the basket of two pitchers, and an extended DL stint for either one probably takes the Mariners out of contention. But, these two are legitimately among the top arms in baseball, and the Mariners will be the favorite in every game where they take the hill. If they can get 65 starts out of that pair, there's a good chance they'll get 45+ wins in those games, and they could then play below .500 ball the rest of the season and still be a playoff contender. That's the blueprint, essentially - win early and often when Felix and Lee are on the hill, try not to get pummeled when the other guys start.
The Giants are perhaps more of a 1-3-3 punch than a genuine 1-2, with JSanchez emerging last season, and we are counting on some starting depth (hell, even Zito was effective), so the comparison is not entirely accurate. Still, worth a look.
So, let me just throw this out there - this team very well might not win. They've bet big on a few guys staying healthy and productive, and they're counting on guys playing better than they have in the recent past in order to score enough runs to contend. There are a ton of risks in this roster, and it could all go horribly wrong. There are plausible scenarios where this team loses 90 games, and they have nothing to do with defense being overrated. (emphasis mine)
The M's have made a push to improve their fielding, not something the Giants can say, but I think the Giants FO believes they have improved the offense, and the assumption is the same by both clubs. That is, a weakness was addressed and thus the team will do better.
Here's the good part, one that Giants fans like to fantasize about:
Will it work? I don't know. But if it does, and the Mariners end up making the post-season, that duo makes them a nightmare to face in a short series. The Mariners certainly aren't as good as the Yankees, Red Sox, or Rays, but in a 7 game series where Felix and Lee take the hill four times, the differences are minimized. With these two guys, the Mariners have a roster built for October. Whether the surrounding pieces are good enough to get them there, we'll see, but there are certainly two cornerstones in place for a post-season run that ends with a parade.
Just my usual scouring of the 'net for interesting tidbits while we all twiddle our thumbs until the season starts.