New boss Steve Evans will hope his side can repeat their win at Craven Cottage last season under Neil Redfearn, which saw McCormack taunted by away fans as he was substituted.
Leeds sold McCormack for £11 million and he had a slow start to his Fulham career, but this season has begun the campaign in better form.
He has one more goal than current Leeds striker Chris Wood, although has played one game more, making their goal ratio hard to split.
What is unusual for McCormack is that he does not have a single assist to his name so far in 2015/16, having provided nine in his debut season for Fulham.
Wood has one and is vastly superior in the air, winning more than three aerial duels per game compared to McCormack who is yet to win any in 11 games this season. He of course can point to strike partner Matt Smith, also of Leeds United, whose power in the air makes him ideal foil for the Scotsman.
McCormack has a better scoring ratio of 17 to 11 per cent of his shots on target being converted, but where he really stands out is landing his efforts on goal in the first place. He tests the goalkeeper with 57 per cent, while Wood's 14 per cent is woefully low.