"No-one expected us to win but we took them to extra-time and anything can happen then.
"Obviously I got my three goals and after the game I was just shattered to be honest, it was a tough game."
He moved to Port Vale in June 2006 and featured over 100 times for Vale in a two-season spell.
It was with the Valiants that one of the low points of Danny's career came. Whitaker's Port Vale side were dumped out of the F.A Cup by non-league Chasetown in 2007, a match that Whitaker remembers well.
He said: "It was just one of them games to be honest. Playing lower league teams in the cup, they've got nothing to lose, it's their cup final.
"They took us to a replay I think, we missed two penalties in the game at their place. It was just one of them horrible nights."
The midfielder then moved onto Oldham, where he worked under John Sheridan. He spent two seasons at Boundary Park before linking up with his former manager at Chesterfield in 2010.
Whitaker is now in his third season with Chesterfield but sighted his first as probably the highlight of his career.
He said: "Yeah definitely. There's not many players who can say that they've actually won a league in their career."
It wasn't just team accolades Whitaker picked up that season, he was also voted in the team of the year by his fellow professionals. Another proud moment for Danny.
"Your fellow professionals vote you in the team of the year, it's fantastic as well because it looks like you're doing the right things on the pitch and your work has not gone unnoticed," he added.
Now 32, Whitaker made no indication that he is ready to hang up his boots just yet.
When asked about his future targets, he said: "I don't know to be honest. Just keep going as long as you can.
"As you get older it gets harder but you've just got to keep going, train well, look after yourself and see where it takes you."
Subscribers to Spireites Player can watch the full interview with Danny.