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We'll repeat the link he gave just now.
In his patented, home-brewed Spectometer, he gives Capps as having more value than Nick Franklin and, if I understand the article right, more value than Miller and Zunino also. Even if he stays in the bullpen.
Not really as farfetched as you might think, if you're going by the number of relievers in BBA's top 100. Who had more career value, Mo Rivera or Jason Varitek?