Weird play there on Nimmo. I tried to type out what happened for those who aren't watching, but it took too many words. First and second now, one out, Buck is still angry despite "winning" the challenge. He didn't win; he just retained the challenge. Nimmo, running from first to second, was tagged with an empty glove. At that point, he would naturally stop running. So, for the umpires to then rule that the Braves would have been able to throw to first, and the back to second and still get Nimmo is, to put it precisely, total bullshit.