Jack Hermansson

Jack Hermansson, known as the Joker, has spent years as one of middleweight's most reliable measuring sticks near the top of the division. The Swedish-Norwegian fighter built his game around a slick, dangerous submission attack paired with increasingly aggressive striking.

His resume is full of meaningful results: a win over former title challenger Kelvin Gastelum that put him in the title conversation, and a victory over rising prospect Edmen Shahbazyan that underlined his role as a contender-tester. Beat Hermansson and you've proven you belong; lose and you've been exposed.

For fans, he's a grappler worth watching because the submission threat is always live. Few middleweights have tested as many contenders and prospects as the Joker.