The 19-year-old striker was due back at Upton Park following Saturday's trip to Dagenham, but he has gone back a couple of days early after being ruled out of the match due to an ankle injury.
McCallum enjoyed a successful stint at Kingsmeadow despite an inauspicious start, when he was sent off on his debut against Morecambe in November.
But after serving a three-match ban he went on to score four goals in eight appearances before picking up an ankle knock three weeks ago.






