Grayson has now confirmed that Crowe has rejected opportunities to leave on loan and the Whites boss is disappointed the ex-Northampton man has not put himself in the shop window.
"Jason has had opportunities to go out on loan but declined them," he told the Yorkshire Post. "He is not in my squad of 25 and that tells you he won't be playing.
"It is disappointing but that is his decision. I can't force players out. I can't drive them to a club myself. But I feel players who turn down loan moves run the risk of being left under the radar."