The Mali international had originally impressed at Craven Cottage, having signed on a free transfer in January of 2012. He formed strong partnerships with both Mousa Dembele and Danny Murphy but, since the pair's departures, injury has plagued him.
He has barely featured this season and while we all know of his technical capabilities, Jol is acutely aware that there is little point of retaining a player who is so prone to breaking down.
"Diarra is injured, so unfortunately he's not in a strong position," Jol said, when pressed about the player's contract, which runs out over the summer.
"We will look after him and hopefully he will be fit again. Like Grygera last year, we will have to make a decision."
Just as was the case with our former full back, the signs are not promising for Diarra. Many comebacks have been mooted over the previous campaign but all have failed to materialise, leaving the former Real Madrid man safely out in the cold.
This could well be the end of the Fulham road for one of our most prestigious free-transfers.