Kim Seong-yoon

For South Korean television director, see Kim Seong-yoon (director).

In this Korean name, the family name is Kim.

Kim Seong-yoon (also transliterated as Kim Sung-yoon, born February 2, 1999) is a South Korean professional baseball outfielder for the Samsung Lions of the KBO League. At 5 ft 4 in (1.63 m), he over-took Kim Sun-bin of Kia Tigers, who stands at 5 ft 5 in (1.65 m), to be the shortest player in the KBO when he debuted for the Lions in 2017. He is 4 in (20 cm) shorter than the average players in KBO and tied with Daichi Mizuguchi of Seibu Lions to be the shortest among Major League Baseball (MLB), Nippon Professional Baseball (NPB), and KBO players.^[1][2] In 2020, Kim was joined by fellow Samsung Lions second baseman Kim Ji-chan, who also stands at 5 ft 4 in (1.63 m).^[3]

Kim Jeong-yoon
Samsung Lions – No. 39
Outfielder
Born: (1999-02-02) February 2, 1999 (age 26) South Korea
Bats: Left Throws: Left
KBO debut
June 4, 2017, for the Samsung Lions
KBO statistics (through June 29, 2025)
Batting average	.300
Home runs	6
Runs batted in	69
Teams
Samsung Lions (2017–present)

Kim Seong-yoon
Hangul	김성윤
Hanja	金盛閏
RR	Gim Seongyun
MR	Kim Sŏngyun

Career

Samsung Lions

Kim joined the Samsung Lions as a fourth round, 39th overall draft pick in 2017,^[4] right after graduating from Posco High School.^[5] In his sixth KBO game, against the SK Wyverns, Kim hit a two-run home run despite never hitting any home run in his high school career.^[1][6]

In 2023, he had a career-high batting average of .314 and 18 steals.^[7]

International

Kim appeared in six baseball contests during the 2022 Asian Games, batting .222/.278/.333 in 18 at-bats, and winning a gold medal for South Korea.^[8]