Jake Shields (born January 9, 1979) is an American (United States) mixed martial artist (mixed martial arts) who is currently fighting at 185 lb (84 kg). He is the last Rumble on the Rock 175 lb (79 kg) champion. He is the first and last Elite XC Welterweight Champion. He is also the former Shooto World Champion and is the current Strikeforce Middleweight Champion (List of Strikeforce champions#Middleweight Championship). He has trained extensively with Cesar Gracie, and is a member of the "scrap pack" which includes fellow Cesar Gracie students Dave Terrell (David Terrell (fighter)), Nick Diaz, Nate Diaz and Gilbert Melendez.

Shields is currently the #3 ranked middleweight in the world by Sherdog and #4 by MMAWeekly. Shields is also currently the #9 ranked Pound-4-Pound fighter in the world by Sherdog