In vitro studies of ibrutinib and venetoclax have noted significant cytotoxicity and synergy in mantle cell lymphoma and chronic lymphocytic leukemia cell lines.Data have demonstrated synergy between the two agents in various other B-cell Non-Hodgkin Lymphoma (NHL) cell lines. The investigators theorize that the combination of ibrutinib and venetoclax will provide dual, yet unique, targeted inhibition for patients with follicular lymphoma, resulting in both significant efficacy and less nonspecific toxicity.