The new Leeds striker has been discussing the challenge facing him at Elland Road.
Indeed, the 21-year-old forward has cited McCormack, as well as Peter Lorimer and Robert Snodgrass, as Scottish 'successes' at Elland Road. And the former Motherwell forward most certainly wants to follow in their footsteps.
McCormack was very much Leeds' saviour the season before last, when his prolific rate of goalscoring kept the Yorkshire side in the Championship.
The Scot left the Whites last summer, however, joining Fulham for a big-money fee and receiving plenty of criticism for his move.
McCormack went on to score 19 league goals for the west London side, again playing a huge part in keeping his team in the second tier.
No wonder Erwin is keen to learn from the former Leeds man, among others: "There’s been a lot of successful Scottish players such as Peter Lorimer and Ross McCormack and Robert Snodgrass and hopefully I can do well here too at Leeds. I spoke to the gaffer briefly and was really impressed with him as well.
"I look forward to seeing what he is going to do with the club next season and starting pre-season. I know the club has a massive fanbase and I can’t wait to start. It can’t come quick enough for me."
Erwin was unveiled as Leeds' new striker on Wednesday afternoon and was pictured being welcomed to Elland Road by Lorimer.
The 21-year-old also spoke of his instant delight upon hearing that Leeds United were interested in him.