It probably is infringement, assuming that this is being done by copying parts of a broadcast of the game. It is up to the holder of the copyright on the original broadcast that is being condensed to decide whether to sue or take other action, such as a takedown notice. Perhaps the holder thinks this is good advertising for its business. They have the right to make that decision.
Now if a person went to the game, and used a personal camera to film it, and posted excepts of that recording, the legal issues would be very different. The ticket probably includes a provision prohibiting filming and photography, so this would be a breech of contract. But it would not be copyright infringement. (In practice if this were spotted, the person would be required to stop recording or leave, at least.)