Most readers of FanGraphs probably understand that as a strategy for scoring runs, bunting is usually a bad idea. There are times when bunting is appropriate: whether for purposes of “game theory” (getting the infield to play further in) or, in certain game situations, to play for the win rather than for overall run expectancy. In other words, while bunts are mostly a bad idea for increasing run expectancy, they can sometimes be a good idea for increasing Win Probability (WPA).
Even with that in mind, it doesn’t seem that teams are exactly getting the message (case in point). In 2010, our data shows that there were 2988 bunts executed, but only 823 of them (just under 28%) resulted in a positive WPA. That number is probably a bit skewed because it doesn’t include bunt attempts that fail (fouled off, etc.), but it does give the general idea. All that being said, bunts do sometimes “work,” so let’s take a look at the 2010’s five most successful bunts as measured by WPA.
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