What happened: Thompson defeated Radtke by technical knockout in their welterweight matchup at Madison Square Garden. The striking stoppage concluded Thompson's final walk from the octagon, capping his announced retirement bout on the UFC 334 card.
Why it matters: The victory fulfills Thompson's plans after previously noting he had one fight left on his UFC contract. The win marks the conclusion of a 14-year UFC tenure that opened with a head-kick knockout in 2012 and closed with another signature kick finish.
By the numbers: Thompson concludes his professional mixed martial arts career with an 18-9-1 record, halting Radtke at the 2:54 mark of the third round.
What to watch: UFC 334 action continues at Madison Square Garden with the main event between Ciryl Gane and Timothy Hokit.