Strikeforce’s lightweight roster just got a little bit deeper, or should I say a little less shallow.

According to MMA Junkie, Strikeforce has signed Gesias “JZ” Cavalcante to four-fight, one-year deal. He could make his debut on August 21 on a card that may feature a middleweight grand prix and King Mo’s first title defense.

The source said the fighter is angling to appear on a Strikeforce card planned for Aug. 21 in Houston. As recently reported, that event may feature the start of a middleweight grand prix to determine the promotion’s new 185-pound champion (should current champ and free agent Jake Shields sign elsewhere), and light-heavyweight champion Muhammed “King Mo” Lawal is expected to fight a to-be-announced opponent.

For those not familiar with JZ, he was once considered one of the world’s top lightweights until he hit a rough patch in 2008-2009. Between knee injuries, canceled fights and losses to Shinya Aoki and Tatsuya Kawajiri, JZ’s stock fell dramatically. But word is he’s healed up, and should make for a strong addition to Strikeforce’s lightweight ranks if he’s able to return to form. Strikeforce lightweight champ Gilbert Melendez has already expressed interest in fighting him.

In other Strikeforce news, rumor has it PRIDE veteran Sergei Kharitonov and Valentijn Overeem, Alistair’s brother who choked out Randy Couture way back in the day, may be next to sign on the dotted line.

Image via Sherdog