RELIEVERS: Drastic xERA changes over the past month

Last week, this column looked at which relievers are used in the highest leverage situations this season. This week, we look at a handful of relievers who have had a big change in their expected ERA over the past month and see how this affects their pens and their roles. Here are the five relievers that caught our attention:

                   xERA  30xERA		
============       ====  ====== 
Ziegler (ARI)      3.17   4.56
B.Wilson (LA)      4.06   2.43
Howell (LA) (L)    3.28   5.03
Duensing (MIN) (L) 4.00   2.87
R.Soriano (WAS)    3.67   4.67

Brad Ziegler (RHP, ARI), J.P. Howell (LHP, LA) and Rafael Soriano (RHP, WAS) have all been a full run of xERA worse the past month than they have been across the entire season. Meanwhile, Brian...

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