Roki Sasaki is 21 years old, and in the eyes of some talent evaluators, he is already in the discussion for the title of best pitcher in the world. Yes, right there with his Samurai Japan teammate Shohei Ohtani, whose national record he broke for the fastest pitch ever thrown by a high schooler four years ago.
Monday night's start against Mexico in the World Baseball Classic semifinals marks his introduction to an American audience certain to spend the coming years frothing for his permanent arrival.

https://www.espn.com/mlb/insider/insider/story/_/id/35881096/wbc-2023-world-baseball-classic-japan-roki-sasaki-mlb-ace