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...

Tonight's Strikeforce bout between Cristiane "Cyborg" Santos and Hitomi Akano is back on after being scratched overnight due to Akano's unwillingness to fight Cyborg, who initially weighed in six pounds over the fighter 146-pound limit.

Cristiane "Cyborg" Santos has weighed in for the second time for her Stikeforce matchup with Hitomi Akano and dropped several pounds, but the fight remains unlikely unless a last-minute deal is reached.

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.

The winner of Saturdays bout between Gilbert Melendez and Rodrigo Damm will be crowned the Interim Strikeforce Lightweight Champion and be granted a shot at title-holder Josh Thomson when the injured fighter is ready to return to action, Strikeforce has officially announced.

Strikeforce heavyweight champion Alistair Overeem will defend his title for the first time in 2009, according to an interview with Strikeforce executive Mike Afromowitz. "We're looking to get him back pretty soon. I'd say more likely than not, you're going to see him defend his title this year," said Afromowitz.

The winner of Saturday's Strikeforce "Shamrock vs. Diaz" co-headliner between Gilbert Melendez (14-2) and late-replacement Rodrigo Damm (8-2) will be crowned the promotion's interim lightweight champion.

Strikeforce middleweight champion Cung Le plans to return to action later this year, possibly for a rematch against Saturday headliner Frank Shamrock.

Fabricio Camoes and Lavar Johnson have been added to the debut edition of ShoMMA: Strikeforce Challengers, which is scheduled for May 15th at the Save Mart Center in Fresno, California.

Lightweights Billy Evangelista and Mike Aina will meet in the main event of the first-ever ShoMMA: Strikeforce Challengers event on May 15th at the Save Mart Center in Fresno, California. Kim Couture is also slated to return at the event against an opponent to-be-named.

The Fight Network is reporting that Rodrigo Damm (8-2) has been tapped to replace the injured Josh Thomson and square off with Melendez (14-2) at the HP Pavilion in San Jose, California.

In addition to negotiations for a rematch between Mitsuhiro Ishida and Gilbert Melendez, Strikeforce is reportedly in talks with undefeated lightweight Lyle Beerbohm regarding a possible bout against Melendez this Saturday at Strikeforce: Shamrock vs. Diaz.

Josh Koscheck has been forced off UFC 98 due to a foot injury, UFC President Dana White will reportedly reduce his public UFC role, Strikeforce is considering a rematch between Mitsuhiro Ishida and Gilbert Melendez for its April 11th event, and more.

A match between top-ranked fighters Robbie Lawler and Jake Shields has been set for Saturday, June 6, at the Scottrade Center in St. Louis, Mo., it was announced today by Strikeforce Founder and CEO Scott Coker.