Here’s a Thought: Kevin Jepsen, Jose Arredondo, and Deceiving ERAs

As an A's fan, I'm always particularly interested in what the rival Los Angeles Angels are doing.

I also often look through the FIP-ERA difference leaderboard to see who's getting lucky or unlucky.

For those of you who don't know, FIP (Fielding Independent Pitching) is a statistic that basically says what a pitcher's ERA would be if he had average defensive luck behind him.

Anyway, two pitchers with very high FIP-ERA differences are Angels relievers Kevin Jepsen and Jose Arredondo. 

Arredondo has an ERA of 5.55, but FIP shows him to be a very effective pitcher, with a 2.33 mark.

Jepsen's ERA is 6.66, but his FIP is a sparkling 2.99.

What happens when a pitcher has a dramatic split like this is that you get two very different opinions.