Disclosed herein are methods, and kits for use in said methods, that aid in the diagnosis and evaluation of a pediatric subject for traumatic brain injury (TBI), using ubiquitin carboxy-terminal hydrolase L1 (UCH-L1), glial fibrillary acidic protein (GFAP), or a combination thereof. Also disclosed herein are methods, and kits for use in said methods, that aid in determining whether a pediatric subject would benefit from and thus receive an imaging procedure, such as MRI or head computerized tomography (CT) scan based on the levels of GFAP, UCH-L1 or GFAP and UCH-L1.