can I let him Fly

[BIGHEAD]

We found a pigeon 2 months ago.
The owner a pigeon racer has let us keep him.
He has only one eye since his accident, with a vehicle.
My Q is we have him in a den with a outside part, but would like to make and trap for him to fly in and out of, by trying to train him over a couple of weeks, he is about 6mths old.
However with only one eye would it be safe to let him fly away and hope he may come back or is it too much to let a bird with one eye fly about

Regards