The Chicago Cubs are one win away from the World Series—and it might be because of a lucky pair of underwear.

Shortstop Addison Russell blasted a two-run home run Thursday night to break a tie against the Los Angeles Dodgers, sparking the team to an 8-4 victory to take a 3-2 lead in the National League Championship Series.

 

The 22-year-old All-Star had been in a major slump—starting off 1-for-24 in the series—until he made one major change: a new pair of underwear. Utility player Matt Szczur revealed during Game 5 that he loaned Russell a pair of leggings ahead of Game 4 after the shortstop forgot his in Chicago, and it led to a major turnaround for the talented young star.

Since donning Szczur’s (hopefully clean) underwear, Russell has had five hits and two home runs, including the crucial long ball in Thursday’s win. Szczur isn’t even on the active NLCS roster, but his contributions could be the reason the Cubs make it to the World Series.

Russell wasn’t the only player to benefit from Szczur’s gear. Superstar first baseman Anthony Rizzo was in just as bad a slump as Russell—going just 2-for-26 in the series—when he decided to switch to one of Szczur’s bats. Since picking up the new piece of wood, Rizzo’s had five hits, including a home run.

“My underwear, my bats” Szczur said during an interview with the Fox broadcasters during Game 5. “People broke out of their slumps and it just so happened to be with my stuff. I feel like a lot of things happen for a reason.”

Things were looking bleak for the Cubs after going down 2-1 in the series and getting shutout in back-to-back games—the first time that’s happened all season—but now they are in position to get to the World Series for the first time since 1945.

All because of a pair of underwear.