Explaining All The World Baseball Classic Tiebreaker Scenarios For Team USA, Italy And Mexico

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USA Baseball Cap (Photo By Michael Macor/The San Francisco Chronicle via Getty Images)

Editor’s Note: This is updated to reflect the fact that Italy cannot get to nine defensive innings in regulation in a game in which it loses since Mexico will bat in the bottom of the ninth.

Team USA’s path out of pool play in the World Baseball Classic just got very complicated.

Well, it could be simple. If Italy beats Mexico on Wednesday, Team USA will move on to the next round as the No. 2 team to advance out of its pool.

But if Mexico beats Italy, well then it gets very complicated. We are awaiting MLB to send official clarification, but here is as we best understand it, while awaiting that confirmation.

It’s not complicated for Mexico. If Mexico wins, it’s advancing. While all combinations require three-way tiebreakers, Mexico wins all the three-way tiebreakers in games in which it wins. If any scenario where Mexico wins, it can’t finish with a worse “quotient of runs allowed divided by defensive outs” then both Team USA and Italy.

Since head-to-head would be out the window with Italy beating the U.S., the U.S. beating Mexico and Mexico beating Italy, then it moves on to the next tiebreaker, which is defensive runs allowed divided by innings played.

Team USA’s numbers are fixed. They allowed 11 runs in 18 innings (54 outs), which equals .203 runs per out. So in any situation where both Italy and Mexico finish with less than .203 as the result, Team USA goes home.

We’re going to stick with nine inning games for now. Extra-innings makes this even more complicated. Mexico is the host team, so if they are winning heading into the ninth, they won’t play the bottom of the ninth. That hurts Italy, as it gives them one fewer defensive inning played.

If Mexico wins while scoring four or fewer runs, Team USA is eliminated. If Mexico wins while scoring five or more runs, Italy is eliminated and Team USA advances, because there is no scenario where Mexico can win without extra innings where Italy records a full nine innings on defense.

Extra innings adds all kind of complications because any scenario where Mexico wins could involve Italy recording zero, one or two outs in the bottom of the inning where the game ends. We’ll leave those computations for a super computer to figure out.

But most simply, if Mexico wins while scoring four or fewer runs, Team USA is out. If Mexico wins while scoring five or more runs, Italy is eliminated.