The trio will be fit for the clash with Everton on Sunday.
Michael Owen will still be out of action for another three-and-a-half weeks.
“Oba Martins, Alan Smith and Mark Viduka will all be fit to make an impact in the run-in and that’s a good boost for us,” he told the club’s official website.
“It’s very important to have them back in the frame. It’s immensely beneficial to us, they could be very important for us in the coming weeks.
“The group of lads we’ve got, they’ll look around them and see senior, quality and experienced players with them.
“Even if they are not quite up to full fitness, the lift they give the rest of the lads is obvious.
“Alan Smith has played in two friendlies and will play in the next one, while Oba will have had some training under his belt by the time of the next match.”