The Royals won seven straight between July 29 and August 5th in what might have literally been the most unprecedented winning streak in baseball history. They did so on the back of Bobby Witt, Jr. who, in the midst of an already torrid stretch that featured a walk-off grand slam, put together a 254 wRC+ during those seven games.
There is still a lot of baseball to be played, but the stretch personified the move from what was to that point a strong season from Witt to the cusp of stardom. There are now only 12 players in baseball with a higher fWAR than the shortstop.