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  1. This was an awesome article. I love these player interviews.

    Comment by Andy — May 9, 2013 @ 10:39 am

  2. Wonderful interview. Amazing to hear a player speak so confidently and in such depth about his own advanced metrics like this. Very cool.

    Comment by Jon Roegele — May 9, 2013 @ 10:42 am

  3. I think I love him.

    Comment by Dan Rozenson — May 9, 2013 @ 10:48 am

  4. great piece. I wonder what these pitchers think about FIP vs xFIP. Does he look at his fly ball rate or actual HRs allowed

    Comment by Pr — May 9, 2013 @ 10:51 am

  5. Very nice article. If I didn’t know better I’d swear this was some sort of Fangraphs fan-fiction. His answers read like advanced metric porn.

    Comment by Reptar — May 9, 2013 @ 10:52 am

  6. As a Tigers fan, I make a general rule to never like a Twin, but man, it’s hard not to here. Awesome.

    Comment by Neil — May 9, 2013 @ 10:57 am

  7. A quick and dirty thing I just did: Expected K/PA equals 0.0633 + O-Swing(pfx)*-0.2315+SwStr%*2.192. The negative o-swing coefficient is strange, but o-swing is not very closely correlated with K/PA (r^2 about 0.14)

    Comment by CSJ — May 9, 2013 @ 11:02 am

  8. O-contact is probably a better bet.

    Comment by Dan Rozenson — May 9, 2013 @ 11:08 am

  9. saw a twitter convo he had the other day talking about his xFIP going down despite him allowing a HR which made his FIP go up.

    Comment by leeroy — May 9, 2013 @ 11:20 am

  10. What a great read. My second year as a happy Fantasy Perkins owner to boot…

    Comment by 8nthatk — May 9, 2013 @ 11:22 am

  11. A Twins player reading into sabermetrics? I can’t even…

    Comment by Alex Kienholz — May 9, 2013 @ 11:28 am

  12. Perkins should be the Twins Player/GM.

    Comment by Brazen Reader — May 9, 2013 @ 11:30 am

  13. That is an amazing piece.

    Comment by Metsox — May 9, 2013 @ 11:39 am

  14. It would be neat to be able to split batted balls between those hit in front of outfielders and those NOT hit in front of outfielders (per the Greg Maddux comment to Perkins)

    Comment by tz — May 9, 2013 @ 11:39 am

  15. Yep, he was discussing a home run he allowed and he noted that since his HR/FB came closer to the league average after that game, his xFIP would go down even though the HR would cause his FIP to increase.

    Comment by Bryz — May 9, 2013 @ 12:29 pm

  16. very cool to hear his reasoning and explanations for his statistics. sabermetrics is getting better and better at explaining player performance, but there are still very definite limits to what we understand. insights from perkins and other stats oriented players and baseball personnel help fill in those gaps. a great read.

    Comment by Kevin — May 9, 2013 @ 2:09 pm

  17. That doesn’t sound quite right.

    His xFIP shouldn’t go down BECAUSE of the HR allowed. It should just not increase like FIP would.

    Comment by Requiem — May 9, 2013 @ 5:35 pm

  18. Go twins! Metrics and projections be damned, I have hope for this year!

    Comment by adohaj — May 9, 2013 @ 10:33 pm

  19. “I… would strike everyone out if I could.”

    Anybody with Perkins on their fantasy team should probably trade him now.

    Comment by Ron Gardenhire — May 10, 2013 @ 2:24 am

  20. Yeah, xFIP just replaces home runs with FB and changes the coefficient to 13x where x is HR/FB. So a fly ball will increase xFIP.

    Comment by philosofool — May 10, 2013 @ 10:06 am

  21. What about the pitchers with a low o-Con% rate that don’t generate many swings out of the zone?

    Comment by Mariners2001 — May 10, 2013 @ 1:06 pm

  22. Seems like a “Quality Inning” stat could be really fun in fantasy baseball, rather than Innings Pitched, Quality Starts, or Wins. Not sure how to quantify that but I like the way Glen looks at it. This series is awesome but this has been the best one yet.

    Comment by eddiegaedel — May 10, 2013 @ 8:23 pm

  23. Bill James used to (maybe he still does) use the term “relief ace” when he was looking at optimal reliever usage. Perkins seems like a great guy for a progressive team to have, because the main argument I’ve seen for teams continuing to use closers, set-up men, etc. in very defined roles is that the pitchers feel more comfortable in those roles. It seems clear that Perkins would feel perfectly comfortable being used at any time, understanding that a manager was using him in the 7th inning with the bases loaded because that was likely to be the most important situation in the game.

    Comment by Ben Hall — May 11, 2013 @ 11:30 pm

  24. Awesome article. Thank you David. Thank you Glen.

    Comment by MN_Oldgoat — May 12, 2013 @ 11:42 pm

  25. Where can we find more of the Q&A’s? Pretty awesome.

    Comment by jkud — July 11, 2013 @ 4:27 pm

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