So You Want to Bunt in Extra Innings
Last week, an interesting question got me wondering about Billy Hamilton and the new extra-innings rules. As it turns out, he’s a valuable runner to have on second base! So valuable in fact, that he projects to gain his team roughly 0.3 wins in a 60-game season just by being fast.
For the Giants, that’s great. For the other 29 teams in baseball (or 28 if the Dodgers end up rostering Terrance Gore), that’s no help. What should their strategy be in extra innings? I had all these run expectancy tables, so I decided to dive in.
First things first: let’s set the parameters of this discussion. I’m going to be considering two decisions. First, does bunting to lead off the inning make sense, and does that decision change based on whether you’re the home or visiting squad? Second, assuming bunting doesn’t make sense, what about stealing third? Presumably you’d steal with one out, what with not making the first out at third base and all, so we’ll focus on those two decision points: bunting to lead off, and stealing if the first at-bat doesn’t produce any advancement.
The value of being a home team is immediately evident when looked at through this lens. Consider a situation where the visiting team scores two runs in the top of the inning. Right away, a bunt goes out the window. That’s a big edge; in 2019, and excluding extra innings so that walk-offs don’t interrupt a team’s run scoring, teams that reached the position of a runner on second base with no outs scored two or more runs 29.1% of the time.
In other words, nearly a third of the time, bunting the runner over serves no purpose at all; your team will need two or more runs just to tie, so the position of that runner is nearly immaterial. Getting to act after knowing how many runs your opponent scored is huge. Read the rest of this entry »

