They can find another closer. Thats my point. See, part of Billy Beane's moneyball theory is to find value where others arent looking. And one of his theories was to nix the idea of a true closer and instead go with a good reliever in that spot. That reliever would then get saves about 75-80% of the time and magically their value would climb. The basis behind his theory is that very few truly dominant closers exist and so many teams are dying for relief help come the break. So, when he takes this good reliever and backs him with the amt of saves he now has, he has improved the players value and has a chance to get much more in return for said player. Both the yankees and the sox have that truly elite closer.
Lets put it this way...
In 2006, Papelbon was good for a 85% Sv conversion rate
In 2007, Papelbon was good for a 93% Sv conversion rate
In 2008, Papelbon was good for a 89% Sv conversion rate
In 2009, Papelbon is good for a 94% Sv conversion rate
Since taking the closer's role, he has saved 129 games and blown only 15 of them for a total rate of 90%. League average in terms of Sv % is 64%. Now that includes middle relievers who give up the lead in the 7th and 8th, but you get my drift. But lets take a tally of the Sv % of the top 10 closers from 2008 not including Paps...
1. KRod- 89% in 2008, career 86%
2. Valverde- 86% in 2008, career 85%
3. Soria- 93% in 2008, career 89%
4. Lidge- 100% in 2008, career 84%
5. Wilson- 87% in 2008, career 85%
6. Rivera- 98% in 2008, career 91% (blown save stat started getting recorded in 2002)
7. Nathan- 87% in 2008, career 90%
8. Wood- 85% in 2008, career 85%
9. Cordero- 85% in 2008, career 82%
10. Ryan- 89% in 2008, career 84%
So look at this list. These are the top third in baseball in terms of closers. Only Rivera has a higher career save conversion rate and only Nathan can claim to be in the 90 percent range. If one assumes that a closer on the red sox will get 60 save opps a season, then the difference between 85% and 90% is 3 games. A 3 game swing in the standings is big. The sox lost the division by 2 games last yr, they won the division by 2 games in 2007 and the yankees had the division by 2 games in 2004. 3 games in the grand scheme of things is huge, and that is a per season difference.