Warning: the following may contain blasphemy.

I have to confess that I'm a bit worried about a member of our bullpen.  Jamie Walker helped to hold our tattered 'pen together last year and is one of only two returning bullpen members from 2007 (the other is Chad Bradford).  However, I'm worried that he sucks.  Shall we examine the evidence?

Year   ERA  WHIP   BAA
2007  3.23  1.21  .244
2008  5.06  1.64  .326

I know that ERA doesn't mean much, but in this instance BAA is the stat that confirms what my eyes have told me: dude is getting rocked. Now, relievers are well-known to go through ups and downs and to suffer slumps. That's fine. But I'm a bit worried that this isn't a slump.

Here's the thing that blows me away. Ostensibly, until he was thrust into the closer's role at the end of last season, Walker was our situational lefty out of the bullpen. This season? He's pitching better against righties, and it's not even close:

vs  WHIP   BAA
LH  1.92  .389
RH  1.29  .219

In 2007, lefties only hit .216 against him.

Thus, my question for the masses: Is Jamie Walker any good any more? If he's not any good (as I suspect), can/should the team do anything about it?