Nick Diaz and Joe Riggs are likely to square off in a welterweight bout on the Showtime-televised main card at Strikeforce: Carano vs. Cyborg on August 15 in San Jose.

Though not yet signed, the bout is reportedly in the works for the event and both fighters are expected to agree to the rematch of their early-2006 meeting at UFC 57 which was won by Riggs via unanimous decision.

Jake Shields needed less than half a round to submit Robbie Lawler in the main event of Strikeforce: Lawler vs. Shields on Saturday, forcing Lawler to tap to a guillotine choke 2:02 into the opening round of their catchweight headliner. In other main card action, Brett Rogers knocked out Andrei Arlovski in just 22-seconds and Nick Diaz submitted Scott Smith.

The Strikeforce: Lawler vs. Shields preliminary card is scheduled to begin at 7:45pm ET with the main card, featuring Lawler-Shields and Arlovski-Rogers, commencing at 10pm ET. Live results are available after the jump...

All twenty-two fighters scheduled to fight at Saturday's Strikeforce event, including headliners Robbie Lawler and Scott Smith as well as main card fighters Andrei Arlovski, Brett Rogers, Nick Diaz, Scott Smith, Phil Baroni, Joe Riggs, Kevin Randleman, and Mike Whitehead, successfully made weight at Friday's weigh-ins.

Nick Diaz, who defeated former Strikeforce middleweight champion Frank Shamrock via second-round TKO in a 179-pound catchweight bout in April, will return to the 170-pound welterweight division following his June 6th 180-pound catchweight showdown with Scott Smith.

Nick Diaz and Scott Smith will square off on Saturday, June 6, in a special 180-pound showdown during the live SHOWTIME telecast of Strikeforce: “Lawler vs. Shields” from the Scottrade Center in St. Louis, Mo.

Nick Diaz, who defeated Frank Shamrock via second-round TKO at Strikeforce's April 11th event in San Jose, California, has passed the drug test administered by the California State Athletic Commission following the contest.

Frank Shamrock took home more than half of the total disclosed salaries for Saturday night’s Strikeforce: Shamrock vs. Diaz, earning $369,790 for his TKO loss to Nick Diaz. While Diaz only acquired $39,950 (including a $10,000 win bonus) for the victory. The second highest earner on the evening was Scott Smith who took [...]

Check out official photos after the jump of Nick Diaz, Gina Carano, Brett Rogers, Scott Smith, Gilbert Melendez, Cris Cyborg and more from Saturday's Strikeforce event at the HP Pavilion in San Jose.

Nick Diaz defeated Frank Shamrock via second-round TKO on Saturday in the main event of Strikeforce's event at the HP Pavilion in San Jose. Gilbert Melendez captured the promotion's interim lightweight title with a second-round knockout of Rodrigo Damm in the evening's co-main event.

Welcome to MMAFrenzy.com's live coverage of Strikeforce: Shamrock vs. Diaz, which takes today at the HP Pavilion in San Jose, California. The event's preliminary card kicks off at 8pm ET with the Showtime-broadcast main card beginning at 10pm. Continue reading for live fight results and play-by-play...

Cristiane "Cyborg" Santos weighed-in six pounds over the 146-pound limit for her scheduled bout against Hitomi Akano on Friday in San Jose, California, and must shed an additional 2.5 pounds by 8pm PT for the bout to remain on the Strikeforce: Shamrock vs. Diaz card. The remainder of the main card successfully made weight.