The Chris Bradford's Dojo chain are dojos owned by the Chris Bradford and used by the Foot Clan for recruiting and training new Foot Ninja.
New Friend, Old Enemy - Debut
The Pulverizer Returns! - Timothy reveals to the Turtles that he was training as Donatello suggested, but it was in one of Bradford's Dojos and Tim was recruited into the Foot Clan as an ashigarusha.
Follow The Leader - Leonardo is taken to Bradford's Dojo as part of an effort by Karai to improve the abilities of the Foot-Bots.