Brayan Rocchio hit a game-tying grand slam in the fourth inning and a walk-off home run in the ninth on Friday afternoon, carrying Cleveland to a 7-6 comeback win over Detroit in the first game of a split doubleheader. He became the sixth player in major league history to do both in the same game. Six. In roughly a century and a half of baseball.

Let that sit for a second before we get technical about it.

What did Brayan Rocchio do against the Tigers?

The shape of it is what makes it. Cleveland was down four runs when Rocchio came up in the fourth with the bases loaded, and one swing wiped the entire deficit off the board. That is the swing most players remember for the rest of their lives. That is the swing that gets replayed at the ballpark on a loop in July.

Then he did it again in the ninth to end the thing, 7-6.

The grand slam is the rescue. The walk-off is the closing argument. Doing one is a good day at the office. Doing both, in the same afternoon, in the same uniform, in a game your team was losing badly enough that a chunk of the crowd was already doing the math on the nightcap, is the kind of afternoon that follows a man around.

How rare is a grand slam and a walk-off homer in the same game?

Rare enough that the entire list fits on a bar napkin. Five players before Friday. Rocchio is number six.

That number is the whole story, and it is worth understanding why it is so small. A grand slam requires three men on base and you at the plate. A walk-off homer requires a tie or a one-run deficit in the last at-bat, your spot in the order coming up, and the pitcher missing. Those two events do not want to live in the same afternoon. The bases-loaded moment usually arrives in the middle innings, when your team is behind. The walk-off moment requires the game to still be close five innings later. You need your club to claw all the way back and then stop clawing, right there, at exactly the wrong-slash-right time, with your turn in the order.

Baseball is a game of enormous samples and almost nothing happens. Then this happens.

checked the almanac: cleveland's most famous swing of the last decade also came off a bat nobody circled beforehand, rajai davis taking aroldis chapman deep to tie game 7 of the 2016 world series. this franchise has a habit of handing the biggest moment to the guy hitting eighth.

What comes next for Rocchio and the Guardians

Rocchio has always been the glove-first shortstop in the conversation, the guy you keep in the lineup because of what he does in the six hole with a runner on second and nobody out. Days like Friday do not rewrite a scouting report. But they do something to a player, and anyone who has spent a summer around a clubhouse knows it: the swing that ends a game changes how a young hitter walks into the building the next morning. The bat gets a little quieter. The at-bats get a little longer.

The teams were splitting the day into two, and I do not have a final on the second game in front of me yet. What I do know is that these two are back at it in Cleveland on Saturday evening, and Detroit's afternoon will not have improved with a night of sleep. Blowing a four-run lead is one thing. Blowing it to the same guy twice is another.

What I am watching next is simple and human: whether Rocchio walks to the plate on Saturday like a man who just found out what he is capable of. That is the part of September baseball I love. Nothing about Friday made him a better player. It might have made him a more dangerous one.