Clark is in the final months of his contract at Villa.
Aston Villa youngster Mitchell Clark has suffered another injury while on loan at League Two side Port Vale - and it may becoming clear now why the Championship side are yet to offer the teenager a new deal.
Vale manager Neil Aspin was quoted by the Sentinel after the League Two side's disappointing 3-0 loss to Colchester United at home as saying that Clark had suffered an injury to his calf - coming off in the 86th minute.
It is the second injury that the Wales youth international has suffered in the space of two months, after returning to Villa in November with a hamstring injury. It saw him miss two of Vale's league games.
Though the injuries will be increasingly frustrating for both Vale and Clark, it may shed some light as to why he is in the final months of his current deal at the Championship side.
Clark's current deal expires at the end of the season, and Villa are yet to offer the teenager a new contract. That is despite his excellent form for Vale in a number of positions, including both wings and on either side of the defence.
Now, he is susceptible to a pre-contract agreement to non-English clubs, and could leave the club for nothing at the end of the season if a new deal is not agreed.
But Clark's second injury in recent months surely shows why Villa have not offered him a new deal, as they are worried that he is prone to injury and may not be worth keeping on side.
Clark has it all to do to prove to Villa that he is worthy of a new deal during the second half of the season, but maybe it is remaining injury free until the end of the season that will be crucial to seeing him put pen to paper.