Posted June 25, 2015
the.kuribo: Let me crunch some more numbers, I think I can come up with a more accurate formula that includes BB and K rates and applies towards plate appearances per game.
In addition to plate appearances versus at-bats, I think one also needs to consider the, what I'll call the X-Factor, for lack of a better word. A rain shortened game means x fewer plate appearances. An injury or ejection or substitution means fewer plate appearances. And one "biggie" that players like you and me don't have control over is last minute lineup changes, where the guy we pick isn't even in the starting lineup because... whatever. And then he comes off the bench and gets 1 plate appearance as a pinch hitter. I've seen streaks ended from ALL of these examples. My 15 game one ended when Freddie Freeman didn't get a hit but was taken out in 6th or 7th because of a lingering injury (for which he is now on the DL I've heard). I mean it might have ended anyway, but who knows with one or maybe two more chances. I saw the current leader at the time have his/her streak ended when /she picked Escobar of the Washington Nationals who struck out in the top of the first inning, and pulled something in his oblique, and boom, streak over. I just think the 80% number is a best scenario case, day in and day out, number, and I don't think it's a fair representation of the actual odds over the course of a long streak where things like I just mentioned have a very good shot of occurring.
I mean I don't even know how to do the math on this, but what if "ordinarily" there is a 80% of success every day, but over the course of 57 days there is an 80% chance that 3 of those days will have only a 30% (because the player only gets one plate appearance)??? I assume that what one would do would be figure that into the overall odds and thus lower the "ordinary" 80% every day to something lower, but these are the types of assumptions that are going to be hard to make even if we can then come up with the right math. As I said, for me, it just "feels" more like about a 2 out 3 chance, whereas for you it may feel like a 4 out of 5 chance, and I'm not sure how we could verify which is actually correct. I suspect it's probably somewhere in the middle, but who knows, perhaps both are optimistic given the variables that occur in a baseball game.