The Rotherham boss is famously a Sheffield United fan and also spent eight years as a successful manager at Bramall Lane.
So when Sheffield Wednesday host him and his Millers side this weekend he can expect a hostile reception at Hillsborough.
But he has been linked with the job in the past. He was heavily linked with becoming the new Owls manager in December 2013 - with Milan Mandaric keen on his appointment, as reported by Sky Sports.
In the end nothing came of it and Warnock has spoken about that interest to BBC Radio Sheffield today - insisting this was not the only time he was approached about becoming the Sheffield Wednesday manager:
"Oh he (Mandaric) was insistent. Over my career I have had three opportunities (to become Sheffield Wednesday manager). Not just the one, three opportunities with previous owners to take over.
"What I liked about that last one is I think it shocked everyone when they did the poll, in the local paper, and I was quite popular.
"It is difficult because when you are from the other side of the city. You are OK while you're winning. But as soon as you start having a rough patch your loyalties are elsewhere...
"But I like Milan. It was very tempting."
He mentions a poll in which he was popular, and at the time that might have been the case.
But this is an entirely different Sheffield Wednesday. They now carry their own ambitions of reaching the Premier League and Warnock can not expect to receive a popular reception when he brings his Rotherham side to try and dent those hopes.