The Mets have 12 relief pitchers on their 40-man squad: Dario Alvarez, Josh Edgin, Jeurys Familia, Sean Gilmartin, Eric Goeddel, Jenrry Mejia, Akeel Morris, Addison Reed, Hansel Robles, Josh Smoker, Carlos Torres, and Gabiel Ynoa.
Very few of these guys are guaranteed an opening ay spot in Queens. Alvarez, Morris, and Smoker will open up in the minors... Mejia will be suspended for most of the season and then probably let go when he comes off the suspension.... and Edgin will open the season still recovering from TJS.
My guess is Familia will be joined by a couple of new names, a re-negotiated Reed, Gilmartin, Robles, and probably Goeddel. Torres and Ynoa could be odd men out here.