Manager Nathan Jones says he will pay any fine Luton Town may have incurred for making 11 changes for Tuesday's EFL Trophy 2-0 win over West Brom.
League One and Two clubs must play a certain number of "first-team" players in the competition.
The Hatters' team for the game included eight players under the age of 21.
Keeper subbed after poor 'first 45 seconds'
It is unusual to see any player subbed off after three minutes without an injury, but Bradford replaced first-choice goalkeeper Colin Doyle with Rouven Sattelmaier that early in their match against Bury.
"He didn't have a particularly good first 45 seconds," Bradford assistant manager Kenny Black joked to BBC Radio Leeds.
However, the competition has been backed by Reading's Under-23 manager Martin Kuhl And West Brom assistant head coach Ben Garner,
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