i rewatched the start of the game, halftime, the period between regulation and overtime and the end of the game as well as about five minutes of game action. i'm about 99% sure it was called in studio. no shots of the announcers (amazingly, there were actually three empty chairs that said espnews on them in the middle of the scorer's table) at any time. and if you are looking for it, there are subtle things like the announcers don't raise their voices much when the crowd is louder and they don't say stuff like "from our angle", etc.
mir, they have cameramen and other staff at the game, so they can still have someone talk to officials or whatnot and report on a particular issue.