Younghoe Koo played 18 TFL seasons from Season 1 through Season 18. He spent his first three seasons with the Canton All-Stars before joining the Los Angeles Lancers in Season 4, where he remained for the final 15 seasons of his career.

Koo earned 1 Pro Bowl and 1 All-Pro selection. His 15-season run with Los Angeles made the Lancers the defining franchise of his career.

He made 417 field goals over his career, averaging 23.2 field goals per season. His 417 field goals are especially notable considering his 18 seasons of sustained production.

Koo’s teams finished .500 or better eight times and made the playoffs eight times. His deepest postseason run ended with an NFC Championship Game appearance, where his team went 0–1.