It was thought that his shoulder injury sustained in training on Friday April 17th would have laid the Coventry City midfielder out for six weeks.
However, the injury is not as bad as first feared and Thornton has returned to training and could be in the squad for the last two remaining games.
"Kevin Thornton also trained yesterday," said Chris Coleman to the CT.
"We initially thought he was going to be out for six weeks with his shoulder problem but it isn't as bad as we thought."