Kristaps Porziis headed to the locker room in the second quarter of the Warriors’ loss to the Detroit Pistons on Friday, and he didn’t return for the rest of the game.After the game, Porziis explained the back issue that sidelined him for the second half.“I kind of started feeling it from the first quarter, started spasming up a bit,” he explained (h/t Anthony Slater). “I tried to move and — while I was warm, I was okay, but in that one play I kind of felt a little spasm.”Porziis took a couple pushes from Pistons center Paul Reed in the second quarter before reaching down towards his lower back; he asked out of the game soon after at the 4:54 mark. Kristaps Porzingis explains the back issue that forced him out tonight. Said it tightened up in the first quarter. Still stiff postgame. Called it spasms. Doesn’t think it’s serious but “probably” won’t play in Atlanta tomorrow night. pic.twitter.com/xt9l7cFB4B — Anthony Slater (@anthonyVslater) March 21, 2026 Warriors C Kristaps Porzingis takes a couple blows to the body, grabs at his back, raises his hand, comes out and heads for...