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March 12, 2010

Between The Numbers

SIERA in Stat Reports

by Matt Swartz

Just a quick update: SIERA is now available in the Stat Reports.  You can find it by selecting "Pitcher Season" under Custom Reports. 

A sneak peak at the 2009 leaders in SIERA among pitchers with over 150 IP:

1. Javier Vazquez 2.68
2. Tim Lincecum 2.73
3. Justin Verlander 2.79
4. Zack Greinke 2.83
5. Dan Haren 2.92
6. Jon Lester 2.99
7. Ricky Nolasco 3.04
8. Roy Halladay 3.09
9. Josh Johnson 3.34
10. Josh Beckett 3.34

The rest of the report is here: http://baseballprospectus.com/statistics/sortable/index.php?cid=122325

The Top 5 differences in ERA-SIERA in 2009 (i.e. pitchers due to improve, min: 150 IP)

1. Ricky Nolasco: 3.04 SIERA, 5.06 ERA
2. Carl Pavano: 3.92 SIERA, 5.10 ERA
3. Chris Volstad: 4.39 SIERA, 5.21 ERA
4. Cole Hamels: 3.55 SIERA, 4.32 ERA
5. Jorge De La Rosa: 3.63 SIERA, 4.38 ERA

The Top 5 differences in SIERA-ERA in 2009 (i.e. pitchers due to regress, min: 150 IP)

1. Jair Jurrjens: 4.38 SIERA, 2.60 ERA
2. J.A. Happ: 4.37 SIERA, 2.93 ERA
3. Randy Wells: 4.33 SIERA, 3.05 ERA
4. Matt Cain: 4.09 SIERA, 2.89 ERA
5. Chris Carpenter: 3.36 SIERA, 2.24 ERA

Enjoy!

Matt Swartz is an author of Baseball Prospectus. 
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