Frank Shamrock and Nick Diaz will meet on April 11 at Strikeforce's first event of 2009. The only thing left to find out is what the weight limit will be. Shamrock last fought at 185 lbs and Diaz at 160 lbs. This leaves a decent sized gap between the two fighters. Diaz did look a little heavy, though, during his brother's last fight against Clay Guida. He's also fought at 170lbs before, so he can probably add the extra weight to move up to 185 lbs. I'm not saying he'll be a normal sized Middleweight. I'm just saying he'll be somewhere between 180-182 lbs for the weigh-in.
Personally, I'd rather see Diaz face Eddie Alvarez. Too bad he signed on with Bellator.
UPDATE: Fight will be at a catch weight of 179 lbs. Scott Coker confirmed it on today's conference call.