The former Ibrox boss is back with the Bantams following a six-year hiatus.
McCall spent three months as Rangers manager
The Yorkshire-born Scot replaced Kenny McDowall as Ibrox caretaker boss in March 2015 and led the Gers to the final of the Premiership play-offs, where they were beaten by Hibernian.
Despite being keen on a full-time position, Rangers plumped for Mark Warburton instead, with McCall taking on a role within the Scotland set up.
Now back at Valley Parade after a six-year absence, could the 52-year-old delve into his contacts book and reunite with some of his old Gers charges?
Here's three possible options...
The Lithuanian was a regular under McCall, but saw his contract terminated by mutual consent following Warburton's arrival. Now 32 and playing for Zalgiris, Zaliukas could fill the void left by Reece Burke's return to West Ham United. He'll be familiar with the area, having spent a season at Leeds United.
The pair first came into contact at Sheffield United, when Law was a young hopeful and McCall was winding down a successful career. Since then the Bantams boss has signed his former teammate on no fewer than three occasions (twice for Bradford and once for Motherwell) - and even followed him to Rangers. With Josh Cullen joining Burke back in east London and Lee Evans returning to Wolves, a move for Law, who's now a free agent, might well be on the cards.
After eight goals in 16 appearances for Raith last season, Hardie will hope to have put himself in first-team contention at Rangers next season. However, Warburton's alleged striker pursuit could put paid to the 19-year-old's dream, prompting him to consider his options. Bradford could be one of those, with Steven Davies in need of replacing and McCall a big fan of the versatile frontman, to whom he handed a debut at Ibrox. Hardie appeared five more times under the Scot, scoring twice.