Pavin Smith hit a walk-off homer against the Yankees, and the Arizona Diamondbacks are still alive in the wild card race. The detail that makes it a story instead of a box score: this is the same organization that waived him two months ago.

Baseball does not usually write it this cleanly. Smith went No. 7 overall in the 2017 draft out of Virginia, the kind of pick that comes with a scouting report read aloud on television and a number that follows you around for a decade. He has spent most of his career since then as a useful part rather than a centerpiece, which is a polite way of saying the prospect grade stopped protecting him a long time ago. Being waived in July is the quietest transaction in the sport. No press conference, no farewell. A line in the transactions column that most people scroll past.

And then he is standing in the batter's box in the last inning of a September game against the New York Yankees with his old team's season hanging on the at-bat. I don't have the full transaction trail on how he ended up back in the desert in front of me, and I'm not going to invent one. I do have the swing.

What it buys Arizona is another day, which in late September is the entire currency. The clubs chasing a wild card spot do not get to play for style points. They play for the right to show up the next afternoon still mattering, and the Diamondbacks get exactly that with the Yankees back at Chase Field for the series finale at 4:11 ET. New York flew across the country and ran into a guy playing for his baseball life. That happens more often in this month than any other.

Checked the almanac: the patron saint of this kind of night is Evan Longoria in 2011, Game 162, the homer that dropped the Rays into October after a summer nobody thought would end that way. Different stakes, same electricity. September rewards the guy nobody penciled in.

What I'm watching next is simple and human. Whether Smith is in the lineup again this afternoon, and whether Arizona can do the unglamorous part: win a baseball game the day after a night they'll remember regardless.