ALCS Rainout a Mixed Bag for Pitchers
The Yankees and Astros both won over 100 games in the regular season but nobody beats Mother Nature. When a rainstorm causes cool terms like “bomb cyclone” or “explosive cyclogenesis” to be bandied about, you know you’re not expecting a light drizzle. Yankee Stadium is currently dry, but with a system the size of the mid-Atlantic barreling up the coast, it didn’t make sense for MLB to pretend that tonight’s ALCS Game 4 was going to take place. Just look at the radar, courtesy of the National Weather Service:
Yikes. The rain provides the Yankees and Astros with an extra off-day now at the expense of losing an off-day between a possible Game 5 and Game 6. This isn’t a big deal for the hitters, but it will result in some revised pitching plans. In a five-game divisional series, teams can generally muddle through with a three-man rotation. Due to the 2-2-1 format, no team plays on three consecutive days, and while the Game 1 starter would have to pitch Game 4 on short rest, the Game 2 starter can pitch in a possible rubber match on normal rest. This extra rest gives teams the flexibility to either stretch their best three starters or, as the Nationals demonstrated, use starting pitchers in relief more aggressively.
But short of baseball going to some kind of impractical 2-2-1-1-1 format, that doesn’t quite work in a seven-game series. So unless you’re going to have your entire rotation do it 1930-style, you’ll need to use a fourth starter. That isn’t an ideal situation for either the Yankees or the Astros. From a pure projection standpoint, it’s actually doesn’t move the probabilities. The Astros get an immediate benefit in that they avoid a Bullpen vs. Bullpen Game 4; ZiPS takes bullpen depth into consideration and Yankees enjoy a significant projected edge in any such bullpen game. Before the rainout, ZiPS projected the Yankees to have a 56%-44% edge in a home bullpen duel, so it’s a nice game to delay if you’re Houston.
The problem you run into with this model is that the rainout doesn’t really add an extra day of rest, it simply moves it. Since there are only two days of rest for a Game 4 starter to pitch in Game 7 now, both teams end up repeating the dilemma of either using a fourth starter — particularly problematic for the Astros — or going with a bullpen game. Read the rest of this entry »