Thursday, April 3, 2008

Stat of the Week

Yesterday's Recap

Pitching just wasn't there. The $30 million dollar man couldn't get past the 6th and this year's Hawkins (i.e. Vizcaino) made a come back awfully tough. Offensive is still trying to find its stroke. Hawpe looked good.

Stat of the Week

I will go easy with the first one...ERA

Earned Run Average: Number of earned runs allowed divided by innings pitched multiplied by nine.

So who is the single season and career Rox leaders for ERA?

Season

ERA

Year

Career

ERA

IP

Kennedy

3.66

2004

Cook

4.47

719

Jennings

3.78

2006

Reynoso

4.65

503

Reynoso

4.00

1993

Francis

4.68

636

Cook

4.12

2007

Jennings

4.74

941

Francis

4.16

2006

Thomson

5.01

611

And to extend the ERA there is such a thing as ERA+ which compares a pitcher to the league average and then normalizes things based on pitching park factors (i.e. Coors Field versus Dodger Stadium). The formula is:
ERA+ = 100*((leagueERA*(Park Factors/100))/ERA)
Basically if you are above 100 you were better than average and below 100 then you weren't so good. Best Rox ERA+ for a single season? That would be 2004 Kennedy campaign which was at 134. That means he was 34% better than the league. Best career would go to Reynoso and Cook who have a career ERA+ of 109. So maybe Cook was worth this summer's pay check?

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