Sue Bird's teammate Breanna "Stewie" Stewart used that line in this article:
Stewie fixed my shot. Alright, so you know how I said that Stewie
hasn’t gotten enough credit for Game 5? Well most of that is because
of what I already talked about: 28 and 7, 11 for 21 from the field,
refusing to let Phoenix run away with it early, pretty much anchoring
us in every way. But what I also want people to know is that, my
flurry of jumpers there, in crunch time — Stewie really deserves
credit for those as well. I started the game shooting alright, but for
some reason went cold around the second quarter. And it was Stewie who
came up to me, while I was on the bench in the third, and she said,
“Gotta use your legs more, gotta use your legs more.” And I’m like,
“Huh?” And Stewie looks at me and she’s like, “Your shot. It’s short.
Gotta use your legs more.”
The T-shirt simply mixes two contexts.