Mike Kyle

Former Strikeforce light heavyweight champion Rafael Cavalcante has tested positive for a banned substance and is out for one year.

Gegard Mousasi and Mike Kyle will attempt to make Strikeforce’s vacant light heavyweight title picture clearer when they meet March 3 in Columbus, Ohio.

The weigh-ins for “Strikeforce: Barnett vs. Kharitonov” will broadcast live on HDNet, as will the preliminary card of the September 10 event.

A light heavyweight tilt between former champion Gegard Mousasi and Mike Kyle is likely for Strikeforce in September.

In case you missed any of the happenings in mixed martial arts over the last seven days, Heavy.com has put together “This Week In MMA” to get you caught up.

Keith Jardine steps up to face Gegard Mousasi on short notice at Strikeforce: Diaz vs. Daley on April 9 in San Diego.

A broken hand has forced Mike Kyle out of his Strikeforce bout with Gegard Mousasi.

Tickets for April 9′s Strikeforce: Diaz vs. Daley go on sale to the public on Saturday and today for “Strikeforce Insider” newsletter subscribers.

Nick Diaz and Gilbert Melendez will defend their Strikeforce titles on April 9 at the Valley View Casino Center in San Diego.

American Kickboxing Academy product Mike Kyle will step in to face Antonio Silva on Saturday’s “Strikeforce: Henderson vs. Babalu” event in San Jose.

Gegard Mousasi expects to return to Strikeforce in February after first competing at DREAM’s New Year’s Eve event.

Sarah Kaufman earned a highlight reel knockout slam at Strikeforce Challengers last night, while Shane Del Rosario and Mike Kyle earned stoppages of their own.