Felix and Fastball Percentage
We all want King Felix to throw more bendy/slow things in the early innings, especially against left-handed batters. During today's game I found myself wondering if he was throwing more or less fastballs than usual, so I poked around with data from today's game, last week's shutout, and Felix's worst and best starts of the season, per tRA. Here are the starts I looked at:
1) May 9th @ Minnesota
Felix was crushed by the Twins, giving up six runs on the back of homers by Mauer and Morneau. He also walked three, only struck out two, and departed after four innings in what would turn into a blowout loss. His tRA? 10.45. Whoopsies.
2) May 30th @ Anaheim
What happens when you give up no line drives, one walk, have 63% of balls in play stay on the ground, and strike out more than 20% of opposing batters? You get a tRA of less than 0.5. Unfortunately, in Felix's case, you also waste a lot of pitches on Angel foul balls, meaning he was pulled in the 7th after 110 pitches. The Mariners would go on to win the game after tying it up in the 9th on what is now the second most heroic home run of the year.
3) June 16th @ San Diego
Felix took advantage of a lineup full of the MLB equivalent of short bus schoolchildren, holding the Padres to two hits over nine innings and never looking in danger of allowing a run. He didn't really pitch that well though, as evidenced by his frankly silly amount of walks and hbp, and he didn't get that many strikeouts either. tRA's verdict? A pretty good, but not fantastic 3.23.
4) June 21st vs. Arizona
This just happened so I'm sure that you have some idea what went on in the game. I'd guess Felix's tRA was a touch under 3.0, but Statcorner doesn't update until midnight so whatever. He pitched pretty well, despite Reynold's late home run.
So that's two pretty good starts, one absurdly good start, and one level-Silva abomination. But I'm not going to do the analysis this time, you are. Take a look at the graph showing %fastballs against pitch count below and see if you can match up the starts to the fastball percentages. Remember, your choices are May 9th, May 30th, June 16th, and June 21st, with corresponding tRAs of 10.45, 0.54, 3.23, and ~2.90. And just to take away an obvious identifier, I've normalised the pitch count*. When you're done answers may be found here.

How did you do? Any interesting observations or insights?
*Yes, I know this skews the data. Why do you hate fun?
3 recs |
32 comments
Comments
Today was awesome.
Once Felix got control of his off-speed pitches he was lights out. He made only one bad pitch today.
by Sinking Away on Jun 21, 2009 8:01 PM PDT reply actions 0 recs
Cool.
I don’t think I did too bad. Got the obvious one and mixed up two of the starts. I probably would’ve gotten them if I had looked at the middle portion more carefully but it was a fun exercise.
by ThundaPC on Jun 21, 2009 8:01 PM PDT reply actions 0 recs
The main thing I'm noticing is that good or bad, Felix throws a lot of fastballs.
Has his use of the fastball decreased at all over the season? I know he said he was planning on using less fastballs a few weeks ago. Has that happened at all?
by DAMellen on Jun 21, 2009 9:03 PM PDT reply actions 0 recs
Not as far as I can tell
I’ll take a look at it at some point
by Graham on Jun 21, 2009 9:46 PM PDT up reply actions 0 recs
His FB is his second best pitch
by linear weights.
"Even the stupidest of men, by some instinct of nature, is convinced on his own that with more observations his risk of failure is diminished."
-Jacques Bernoulli Ars conjectandi 1713
by Bearskin Rugburn on Jun 21, 2009 10:26 PM PDT up reply actions 0 recs
That doesn't mean he should throw it 70% of the time.
Plus, if he threw his other pitches more it might affect how well all his pitches work. I strongly believe that he should throw a little more bendy and a lot more slow. Haven’t we discussed this before?
by DAMellen on Jun 21, 2009 11:53 PM PDT up reply actions 0 recs
Ok, May 30th was his best game so far.
He did what a great pitcher is suppose to do. He got luck today, and he got the win.
by Sinking Away on Jun 21, 2009 9:11 PM PDT reply actions 0 recs
He may have not got the win.
But he definitely had luck in the 2nd inning. The odds of a pitching walking out of a bases loaded/no out situation without a run scored is pretty low.
by Fin on Jun 21, 2009 11:35 PM PDT up reply actions 0 recs
This is pretty sweet, Graham
and I was at two of those starts! =)
by seattlebruin on Jun 21, 2009 9:20 PM PDT reply actions 0 recs
Hey, I got them all right.
I’m still not sure what we can conclude from this though. We want Felix to throw about 70% fastballs?
Thug Life
by Slow Country on Jun 21, 2009 9:37 PM PDT reply actions 0 recs
No conclusions can be drawn
I just thought it was fun
by Graham on Jun 21, 2009 9:42 PM PDT up reply actions 0 recs
I thought it was fun?
This little data doesn’t lead to definite but we can certainly formulate hypotheses from it, and it strengthens my personal belief that Felix’s better starts don’t necessarily have less overall fastball but have less of them early.
by Graham on Jun 21, 2009 9:48 PM PDT up reply actions 0 recs
It's very difficult to distinguish between the colors on the fangraph charts
what’s the deal? I thought he pitched a hellava game today.
by Sinking Away on Jun 21, 2009 9:44 PM PDT up reply actions 0 recs
Yeah, I got that, but I thought you were trying to make a point.
Come on Prof. it’s not fair if I signed up to learn from this site. On the other hand, you are so forgiven, since I haven’t paid anyone so much as penny, and I’ve learned quite a bit, thank you for your work here.
by Sinking Away on Jun 21, 2009 10:02 PM PDT reply actions 0 recs
Sometimes information is fun for information's sake.
Also, making fun of people for understanding things you don’t is pretty dumb.
by acblue on Jun 22, 2009 12:32 AM PDT up reply actions 0 recs
I didn't mean to make fun of anyone, that certainly wasn't my intention. I was trying to be thankful.
I’ve learned a lot on this site, but apparently I’ve offended people. I’ll go back to lurking and not asking any questions.
I miss your defense Endy, thanks for the memories. Get well soon.
by Sinking Away on Jun 23, 2009 8:43 PM PDT up reply actions 0 recs
No you're supposed to do the analysis.
by NOLAmarinergirl on Jun 22, 2009 9:12 AM PDT reply actions 0 recs
We aren't all at the same place in our ability to do "the analysis".
Goodbye.
I miss your defense Endy, thanks for the memories. Get well soon.
by Sinking Away on Jun 23, 2009 8:45 PM PDT up reply actions 0 recs

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