I wrote here, and again here, about Americans’ use of the typically BrE “sport,” rather than the traditionally American “sports.” I’ve continued to see a lot of examples, most recently from tennis star Venus Williams yesterday at the Australian Open:
I think why people love sport so much is because you see everything in a line. In that moment, there is no do-over. There’s no retake. There is no voice-over. It’s triumph and disaster witnessed in real time. This is why people live and die for sport, because you can’t fake it.
At this point, AmE “sport” seems sufficiently widespread not to warrant further comment.