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October 21, 2009

Ahead in the Count

What Happened to Cole Hamels?

by Matt Swartz


At this point in the season, most baseball fans are aware that the Phillies' Game Five starter this evening, Cole Hamels, has had far more trouble preventing runs in 2009 than he did in 2008. In 2008, Hamels seemed unhittable for much of the season and the post-season, and the Dodgers knew going into Game Five last year that they had their work cut out for them as they faced elimination, down three games to one. After knocking him around in the fifth inning of last Thursday’s series opener, the Dodgers are confident that they are up against a different pitcher than the one that stymied them for the clincher last October, as they face elimination yet again.

Many reasons have been presented for the decline of King Cole. All through last season, prognosticators warned about "the Verducci Effect" and its impact on young Hamels. The Verducci Effect states that pitchers under 25 years old who threw thirty or more innings in the past year than they threw in the year before that are particularly vulnerable to injuries in this year. From the time Hamels hurt his elbow in spring training, many have claimed that he has been playing hurt. However, despite being hit by a line drive and twisting his ankle falling off the mound in early starts, Hamels managed 31 starts during the regular season and threw 193 2/3 innings. His velocity was the same as last year as well, averaging 90.4 mph on his fastball in 2008 and 90.2 in 2009. However, it seems clear that something is going wrong for Hamels on the mound. His ERA climbed from 3.09 last season to 4.32 this year, and his WHIP rose from a league-leading 1.08 in 2008 to a mediocre 1.29 in 2009.

Hamels has maintained all season that this has been the toughest one in his career, and that he has learned the most from it. His detractors claim he is distracted by his celebrity, frequently starring in commercials and advertisements throughout the 2009 season.

However, I will present an alternative view in this article: Cole Hamels has pitched just as well last year as he has this year.

I know that his ERA jump appears ugly, but bear with me for a minute. At this point, most sabermetricians have learned that a pitcher’s peripheral statistics (strikeout rate, walk rate, and ground-ball rate) are far more persistent and indicative of his true skill level than his BABIP and his home runs per outfield fly ball. Both BABIP and HR/OFFB are far more vulnerable bad luck than K/PA, BB/PA and GB/BIP. Cole Hamels appears to be a victim of this as we look at these sets of numbers for 2008 and 2009.


Year  K/PA  UBB/PA  GB%   FB%   LD%  PU%  BABIP  HR/OFFB
2008  .214  .050   41.1  30.3  19.0  9.6  .262   .139
2009  .206  .048   43.6  26.3  19.6 10.5  .321   .153

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Premium Article On the Beat: A Showdow... (10/21)
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