The Tigers’ chief scout was in Scotland last weekend to make a check on Whyte in Crusaders’ Challenge Cup semi-final against Inverness Caledonian Thistle.
The 22-year-old started on the bench but came on with his side 3-0 down and sparked a comeback which almost saw the part-timers claim a draw.
Whyte, who recently became the first player in eight years to win two straight Northern Ireland Football Writers’ monthly awards, laid on Crusaders’ second goal.
His devastating form this season has sparked fresh interest from Championship scouts.
He helped the Crues to five wins and top spot in the Premiership in December, with goals against Glenavon, Linfield, Cliftonville and Ballymena United. In November, he earned the award with nine goals in seven games over the course of the month.
And it was his late winner that sunk Dundee United in the Challenge Cup quarter-final.
This time last year, after the Crues knocked back two Dundee United bids, manager Stephen Baxter said: ‘The offers are absolutely nowhere near what we would expect for a player of this calibre.’
Whyte was crowned the league’s Young Player of the Year in 2015 and was handed trials at Everton and Celtic.
Cardiff remain unhappy with Derby's decision to postpone Sunday's Sky Bet Championship game at Pride Park.
Dundee United boss Csaba Laszlo has been left hoping for St Mirren to slip up in the race to seal promotion to the Ladbrokes Premiership.
Crewe will consider starting Chris Dagnall when they host Forest Green on Tuesday.