It is already tough enough for rookie Mike Glennon making his first NFL start on Sunday.

But now his receivers are in question as neither Vincent Jackson nor Mike Williams practiced on Wednesday, per the Tampa Bay Times.

Williams, who is battling a hamstring injury, indicated that he feels fine and expects to play Sunday. Jackson, who was out with a rib injury, was not in the locker room to comment on his condition.

The Bucs will want to get both receivers back as quickly as possible to help ease the transition this week from Josh Freeman to Glennon.

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Terry McCormick covers the Titans for TitanInsider.com