The 27-year-old centre-back has played 32 times for Leeds this season but is out of contract in the summer and has started just once under McAllister, his first game in charge against Tranmere at Elland Road.
"Matt was one of the players I sat down and told him there were two or three players ahead of him," McAllister confirmed. "His attitude has been excellent, but if he can find himself a club to go to we'll certainly look at that."