That is because the playmaker failed to secure the deal before 12 noon today, which is the deadline for registering players for Wednesday’s fixtures.
It means Pedraza will make his debut in the West Yorkshire derby against Huddersfield Town on Sunday.
GETTY
Alfonso Pedraza joined Leeds United on a loan deal today
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Leeds are fourth in the Championship heading into tomorrow’s game at Ewood Park.
Huddersfield sit one place below Leeds in fifth place in the Championship and beat their rivals 1-0 at Elland Road back in September.
Leeds are hoping to secure more deals before today’s 11pm deadline but have already missed out on West Ham striker Ashley Fletcher.
Long-standing target Sergi Canos has also today moved to Brentford.