TAS-102, Irinotecan, and Bevacizumab for the Treatment of Pre-treated Metastatic or Unresectable Colorectal Cancer, the TABAsCO Study

Inclusion Criteria: * Advanced colorectal cancer (metastatic or unresectable): Histologically or cytological proven adenocarcinoma of the colon or rectum which is metastatic or otherwise incurable * Prior treatment with a fluoropyrimidine (5-fluorouracil \[5-FU\] or capecitabine) and oxaliplatin in the metastatic/unresectable setting OR, recurrence within 12 months of adjuvant therapy with a regimen that included oxaliplatin * Have an Eastern Cooperative Oncology Group (ECOG) performance status of 0-1 * Hemoglobin \>= 9 g/dL * Absolute neutrophil count \>= 1500/mm\^3 * Platelet count \>= 100,000/mm\^3 * Creatinine \< 1.5 upper limit of normal (ULN) or if \>= 1.5 x ULN creatinine clearance (CRCL) \>= 30 mL/min (by Cockcroft-Gault) * Bilirubin \< 1.5 x ULN * Aspartate aminotransferase (AST)/alanine aminotransferase (ALT) =\< 2.5 x ULN or =\< 5 x ULN if with hepatic metastases * Have measurable disease per Response Evaluation Criteria in Solid Tumors (RECIST) 1.1 criteria present * Participants of child-bearing potential must agree to use adequate contraceptive methods (e.g., hormonal or barrier method of birth control; abstinence) prior to study entry. Should a woman become pregnant or suspect she is pregnant while she or her partner is participating in this study, she should inform her treating physician immediately * Participant must understand the investigational nature of this study and sign an Independent Ethics Committee/Institutional Review Board approved written inform…