Using cross-level data from 364 supervisor-subordinate dyads, we examined how relational exchange quality, perceived organizational support (POS), and organizational identification interrelate. We found subordinate POS mediates the relationship between leader-member exchange (i.e., LMX) and organizational identification. We also found the relational context matters--namely, the immediate supervisor's relationship with his or her manager (i.e., leader-leader exchange, LLX). Our findings suggest higher quality LLX creates a spillover of resources and reduces the negative association between lower quality LMX and POS. Our study extends both social exchange and social identity theories. First, we delineate "how" relational exchange quality associates with one's identity in the organization--placing POS as an integrative mechanism between exchange and identity. Second, we expand the purview of social exchange theory by including other proximal (and interpersonal) relationships as context for social exchange between the individual and organization. Limitations, future research directions, and practical implications are also discussed. (Contains 2 figures and 1 table.)