The Scot struck twice in the first half of a 2-2 draw against the League One side Simon Grayson again took the opportunity to give members of his squad some time on the pitch.
Sanchez Watt was instrumental in McCormack's first goal, but the visitors, who included former Leeds striker Anthony Elding in their ranks, hit back with two goals of their own. It was 2-2 before the break, though, when McCormack levelled with a great strike from distance
United reserve team coach Neil Redfearn said: "It was a good work-out for the lads. Rochdale sent over a strong team and it was a good exercise for everybody.
"Ross scored a couple of goals, there were some hard-working performances, and the importance of games like this was highlighted last week when Leigh Bromby played in a behind-closed-doors game against Newcastle last midweek then stepped into the first team on Saturday."
The match was orginally scheduled for Thorp Arch, but took place at Elland Road due to the freezing conditions.
"As ever I'd like to thank the groundstaff," said Grayson.
"We've arranged these games to give players the opportunity to play matches and when it was clear that Thorp Arch wouldn't fit, they worked hard to ensure we could still get the game in at Elland Road.
"With the reserve fixtures as they are and with a number of first team games coming up, it's an important part of our preparations for Christmas that we could get the lads some time on the pitch."
United: Higgs, Hughes, Faye, Parker, Bessone (Thompson), Sam, Morrison, Watt, Somma (Hatfield), McCormack, Paynter.
GRAYSON TURNED DOWN PREMIER CLUB
LEEDS UNITED'S UNSUNG HERO
LEEDS ARE ON THE MARCH HOME