Castle enters 2026 as a developmental piece buried on the Indianapolis depth chart, carrying an expert consensus rank of RB #193 and sitting rostered in essentially zero leagues. There are no 2026 projections attached to his profile, and he logged no measurable production in 2025, so any fantasy case rests entirely on opportunity that has not yet materialized. At 6'0" and 221 pounds out of Duke, he brings the frame teams covet for short-yardage and goal-line work, but frame alone does not move the needle without touches.

The one genuinely encouraging note is scheduling: Indianapolis draws the fifth-easiest slate for running backs, and the fantasy-playoff stretch against Tennessee, Cincinnati, and Cleveland grades as the softest in the league. That matters only if Castle climbs the ladder. Until injuries or attrition hand him a role, treat him as a waiver-wire name to monitor rather than a draftable asset.