Grant is pleased to see the 30-year-old back to full fitness and admits his availability is a huge boost.
"We are obviously delighted that Carlos is back and available," said Grant.
"He had been training really hard and there is nothing worse than when you've been training yourself than not having a reserve game to play in when you feel the time is right.
"He has put a lot of work into his rehabilitation with the physios and the doctor.
"It is easy putting that in but you need to have someone who is responsive to it and he has been fantastic."