The model of this study was theoretically found on the agency theory. In analyzing the data, this study utilized the panel data methodology on 21 banks with 68 observations. Based on the panel data results, the random effect model was used to examine the effect of the predictors on the financial performance measured by ROA. In Nigerian banks, the result indicates that the relationship between CEO tenure and ROA is positively significant. This study further found that the relationship between board size and ROA is positively insignificant. In addition to that, this study found that the relationship between audit committee size with ROA is negatively insignificant. Also, this study found that the relationship between firm size and ROA is negatively significant while the relationship between leverage, bank age and ROA were found to be positively significant. Finally, the outcome of the relationship between management change and ROA is positively insignificant. Besides providing suggestions for future research work, this study provides several recommendations for regulators and the Nigerian banking industry.