Could the QB wear an ineligible number so we can have an eligible number (not receiver) on the LOS?

Our best blocker is our LT and he would probably be an incredible TE. I’d love to give him an eligible number when we are in 21 personnel, but I can’t have him change his jersey every time we go 10 personel.

Could he wear an eligible number as a LT if the QB is wearing the 5th ineligible number?