The 22-year-old completed his permanent move to Elland Road in time to be included.
Grayson, not expected to make many changes to his starting line-up, started with Argentinian striker Luciano Becchio on the substitutes' bench in Saturday's FA Cup draw at Tottenham and played Robert Snodgrass in an advanced role just behind Jermaine Beckford.
The Leeds boss must decide whether to retain the same formation, or switch things around slightly, with one eye on his side's game with Colchester at Elland Road on Saturday.
Leeds are chasing their first league win since the 4-2 success at Stockport at the end of December having drawn against Wycombe and lost at Exeter in their last two matches.
