"Kamara has really been a revelation in the few days of training," manager Roy Hodgson told the club's official website
"After training on his own or with the sports science people to recover from his knee injury all of a sudden he's back in training and it's another player for us.
"I regard that as a tremendous bonus and it's in that area that I was anxious to find cover.
"I wanted another front player at the club and I was worried that Kamara wouldn't feature too much.
"But from what I've seen so far, that was an unnecessary fear because it look like he's going to be back in with us and we'll have a fourth front player.
"His pace is there and his enthusiasm is there and if I was to start him in a game, he could surely do it. The risk would be that after 20 minutes at that level he'd be blowing and finding life hard.
"We've got to build up his match-fitness. In training he's fine, he flies around and comes off the pitch with a sweat like everyone else.
"But it's going to take him a little bit of time to get that match fitness and ideally we'd like to try and get him in a couple of reserve team matches first."