Kien Makai Vu (born October 13, 2003) is an American professional baseball outfielder in the Cincinnati Reds organization.
Vu attended Point Loma High School in San Diego, California. He committed to play college baseball at Arizona State. Over his three seasons at Arizona State he recorded 25 home runs, a .351 batting average, a .609 slugging percentage, a 1.062 OPS, a .453 OBP, and a 0.991 fielding percentage.
In the 2025 MLB draft, Vu was selected 264th overall by the Cincinnati Reds. During the 2025 season he played with the ACL Reds and the Daytona Tortugas,<Ref name="Ken Vu MiLB">Kien Vu Stats, Age, Position, Height, Weight, Fantasy & News | MiLB.com</ref> where he was named FSL Player of the Week for the week of August 17. He was assigned to the Dayton Dragons to start off the 2026 season.<Ref name="Ken Vu MiLB" />