The young Blues full-back has moved to The Sixfields on an intial one months loan deal.
Sadler is expected to go straight into the Cobblers side for their division three clash against Bury this weekend.
The young Blues full-back has moved to The Sixfields on an intial one months loan deal.
Sadler is expected to go straight into the Cobblers side for their division three clash against Bury this weekend.