The former All Blacks centre is heading to Manchester later than originally planned having signed from Munster on two-year contract but the club are hoping he'll soon be ready to take up his role as captain.
Diamond said: "It's taken a couple of weeks longer than we had hoped but now that Sam has all the necessary paperwork he will soon be leading the team out as our appointed team captain."
Meanwhile Sale have been hit by the news that Hendre Fourie needs a shoulder operation and will be out until at least the new year.
Diamond added: "Hendre injured himself playing for England against Ireland before the World Cup.
"He limped off with a hamstring strain but has since been struggling with a shoulder injury that will require surgery.
"His rehabilitation will start immediately after surgery and we expect him back early in the New Year."
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.