Abstract: A positioner is provided for maintaining a reinforcing rod in a certain position within a void of a building unit. The positioner is sized and shaped to be attached to a reinforcing rod before the rod is inserted into the void of one or more concrete blocks or other building units. The positioner has a slot portion that fits onto the rod as well as two biased support portions that extend from the slot portion to engage the rod in a clip-like manner. The support portions are designed to engage the sidewalls of the void and may be compressible towards the rod while maintaining engagement with the rod to allow the rod and positioner to be inserted into voids that have narrower widths due to excess grout or other restrictions within the void.