I’ve updated the 2013 Relief Pitcher Guide and made it free to everyone via the Fantasy Fix. You’ll get about 42,000 words on mostly relievers and how they might fit into saves, holds, K/9 and other types of leagues.
For cliff notes, check out here and here, which focused on some sleeper candidates including Rhiner Cruz, Kelvin Herrera, Carter Capps, Esmil Rogers, Junichi Tazawa, Jake McGee, Tommy Hunter, Cory Burns, A.J. Ramos, Fernando Salas, Josh Edgin, Nick Vincent, Brad Brach, Zach Stewart, Chris Leroux, Raul Valdes, and Adam Ottavino. I also went into some potentially volatile bull pen situations and which relievers might gain value in head-to-head leagues here.
For full details read the article at http://www.thefantasyfix.com/2013/03/2013-updated-relief-pitcher-guide/.