Jeff Sullivan FanGraphs Chat — 5/28/13
9:00 |
: Whoa. Is this chat going to start on time?
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9:01 |
: Sort of! Let’s do it!
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9:01 |
Do you know anything about the NF (nasty factor) measurement of each pitch on MLB Gameday screen? I presume it is some combination of velocity, location and movement. Is this something worth keeping an eye on when trying to judge a pitcher’s performance? If so, can we get it tracked on Fangraphs? |
9:01 |
: I don’t know if they’ve changed NF over the years since it was introduced, but when it was newer, I remember Matthew Carruth did some investigation and he found it was basically worthless.
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9:02 |
: It’s a neat idea, but pitching is too complicated and pitch effectiveness relies too much on the pitches before and the pitches after. And PITCHf/x doesn’t know anything about deception. So their heart is in the right place, but this isn’t a stat to look at.
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9:03 |
Julio Urias from LA , top of the rotation projection? |