Teams looking for a reliever at the deadline want players at the end of their contract. The teams can fill that need in the off season without giving up major prospects. This extension actually hurts the Twins chances of trading Perkins. Time will tell but many people here are making the huge assumption that Perk will be a good closer for the next 4 years. If we look back to 2010 the "elite closers" that year were Brian Wilson, Heath Bell, Rafael Soriano, Joakim Soria, and Rivera. That's 3 guys that got injured and missed full seasons and 2 that just fell apart. 2009 elite were: Nathan, Rivera, Francisco Cordero, Jonathan Papelbon, Ryan Franklin,, Trevor Hoffman, Jonathan Broxton, and Andrew Bailey. That's 3 guys with significant injuries and 3 guys that fell apart. I won't look back any further but those aren't promising results.