Is the rotation an unaddressed fatal flaw?

When the 2009 season began, there was very little doubt in anyone's mind that the Red Sox had both the depth and talent in the starting rotation for it to be considered, not only the teams' primary strength, but what made them favorites to advance to the World Series from the American League. With dueling aces at the top in Josh Beckett and Jon Lester, depth in the middle with Daisuke Matsuzaka, Tim Wakefield, and Brad Penny, and a plethora of options at the end ranging from top prospect Clay Buchholz to perennial All-Star and future Hall of Fame pitcher, John Smoltz, the front office had covered the rotation in spades. And that doesn't even look more deeply into the farm system or bullpen where the likes of Justin Masterson (since dealt away), Michael Bowden, and Junichi Tazawa lurked. Even with slow starts from the top of the rotation, conventional wisdom viewed the rotation as one of the best in baseball. While Beckett and Lester found themselves struggling ou...