Love the tables/stat charts @mnfireman. Thanks for going to the effort to post them for all of us to see.
The most important stat for relievers, imo, is inherited runs scored, and it is usually nowhere to be found in the tables. After all, that is what they are brought into the game for, relief, and not to let the runners score. Sure, it is not their personal earned run when they come in and immediately give up the hit that lets the runners score, but that is their main job, and the stat is most important to see if they can really provide relief.