@Region Philbis,
One possibility is that some of their competition could've had an emotional let-down when facing a team who wasn't going anywhere in the standings.
For better or worse, I recall that I used to play a lot harder against better tennis players than I did when I faced someone who was either worse or the same level as me.
And there's another possibility, it could be that he either isn't the same physically or mentally as he was last year. Something might be off in his concentration..or is it his delivery? It's over my head.
Not intending to be too hard on the dude but ... a 20-save season is not exactly an indication of the top-shelf reliever.