It was a move which initially surprised many of the Rams supporters, considering he had a decent campaign at the Ipro stadium and came runner-up in Player of the Season vote.
Nonetheless, Shackell joined the Clarets on a four-year contract and led the club to promotion in 2014, incidentally pipping Derby to the second automatic promotion spot.
Now, with the defender entering the final 12 months of his deal and the Clarets back in the second-tier, Derby are keen on bringing him back to the East Midlands, as confirmed by club reporter Owen Bradley.
The Rams are making a summer splash under new owner Mel Morris and newly-appointed manager Paul Clement with promotion to the Premier League their main season objective.
Darren Bent, Jason Pearce and Scott Carson have already arrived, and the prospect of re-signing Shackell has seemingly gone down well with the supporters commenting on Twitter.
Here is a selection of the very best Tweets:
If we get Weimann, Ince and Shackell we will take some beating next season Shackell should never have been sold— Russell Sowden DCFC (@SowdenR) June 15, 2015
So exciting being a #dcfc supporter nowadays! Trying to sign Weimann, Ince & Shackell, gone were the days of signing players from L2!— Ash (@dcfc_89) June 15, 2015
Of all the transfer speculation at Derby, I'd like Shackell the most. However, why wouldn't Burnley offer him a new contract this summer?— Danny Simpson (@dannys1mps0n) June 15, 2015
Shackell for £2m sounds a good deal for both sides-only has 1 year left on his contract so Burnley could hardly complain about the fee #dcfc— StuartF (@sjforsyth) June 15, 2015
I'm a huge fan of Shackell, and like having a natural left sided centre half. Board are really showing their intent..#dcfcfans— RamsChat (@Rams_Chat) June 15, 2015
If we can get Shackell, Weimann and Ince in it would show huge intent this summer. Exciting times ahead.. #dcfcfans— Derby County Talk (@derbycountytalk) June 15, 2015
We'll go up if we sign Jason Shackell again. Absolutely quality in this division and just what we need. #dcfc— Jack.O (@TheJackOrton96) June 14, 2015