The results of a critical reexamination of previous experimental observations of the (X (2)Pi(g)) ns sigma(g) (1,3)Pi(g) Rydberg states of O-2 are employed to optimize a coupled-channel Schrodinger-equation (CSE) model describing rovibronic interactions among a number of (1,3)Pi(g) Rydberg and valence states. The results of calculations using this CSE model are compared with the experimental energy-level and predissociation linewidth data base. As a result of the optimization process, relevant potential-energy curves and Rydberg-valence, Rydberg-Rydberg, and valence-valence interactions are characterized for (1,3)Pi(g) states in the similar to 6.5-9.5 eV region above the ground state of O-2. The precision of these characterizations and the interpretation of the experimental observations are found to be limited by the quality of the existing data, which exhibit a number of inconsistencies that cannot be reconciled without new, well-characterized experimental studies. In spite of these difficulties, the present CSE model, as currently parametrized, represents a significant improvement over previous work, enabling identification of a number of previously unassigned spectral features associated with perturbation of the 3s sigma(g) d (1)Pi(g) state by the parallel to (1)Pi(g) valence state and an anomalous J sensitivity in predissociation branching ratios for the d(v=1) level. In addition, the electronic structure and predissociation of the ns sigma(g) states for n greater than or equal to 4 are found to be strongly influenced by ns sigma(g)-(n-1)d sigma(g) Rydberg-Rydberg interactions.