TIGER-1: Safety and Efficacy Study of Rociletinib (CO-1686) or Erlotinib in Patients With EGFR-mutant/Metastatic NSCLC Who Have Not Had Any Previous EGFR Directed Therapy

1. Histologically or cytologically confirmed metastatic or unresectable locally advanced/metastatic NSCLC 2. Documented evidence of a tumor with activating EGFR mutations by local testing. Patients with exon 20 insertions are not eligible with the exception of patients with documented evidence of the exon 20 insertion A763\_Y764insFQEA in the EGFR gene 3. Have undergone a biopsy or surgical resection of either primary or metastatic tumor tissue within 60 days of the first day of study treatment, C1D1, and have tissue available to send to sponsor laboratories or are able to undergo a biopsy during screening and provide tissue to sponsor laboratories 4. Measureable disease according to RECIST Version 1.1 5. Life expectancy of at least 3 months 6. ECOG (Eastern Cooperative Oncology Group) performance status of 0 to 1 7. Minimum age 18 years (in certain territories, the minimum age requirement may be higher (e.g. 20 years in Japan and Taiwan) 8. Adequate hematological and biological function, confirmed by defined laboratory values 9. Written consent on an IRB/IEC-approved Informed Consent Form (ICF) prior to any study-specific evaluation

1. Documented evidence of an exon 20 insertion activating mutation other than A763\_Y764insFQEA in the EGFR gene 2. Prior treatment with cytotoxic chemotherapy for advanced NSCLC; neoadjuvant/adjuvant chemotherapy is permitted if at least 6 months has elapsed between the end of chemotherapy and randomization 3. Active second malignancy; i.e., patient known to have potentially fatal cancer present for which he/she may be (but not necessarily) currently receiving treatment 4. Patients with a history of malignancy that has been completely treated, and currently with no evidence of that cancer, are permitted to enroll in the trial provided all chemotherapy was completed \> 6 months prior and/or bone marrow transplant \> 2 years prior to first day of study treatment 5. Known pre-existing interstitial lung disease 6. Brain metastases 7. Treatment with prohibited medications less than or equal to 14 days prior to first day of study treatment 8. Patients who are currently receiving treatment with any medications that have the potential to prolong the QT interval if that treatment cannot be either discontinued or switched to a different medication prior to administration of study drug 9. Prior treatment with EGFR TKIs (e.g. erlotinib, gefitinib, neratinib, afatinib, AZD9291, or dacomitinib), rociletinib or other drugs that target mutant EGFR 10. Clinically significant abnormal 12-lead ECG, QT interval corrected using Fridericia's method (QTCF) \> 450 ms 11. Inability to measure QT interval on ECG 12. Personal or family history of long QT syndrome 13. Implantable pacemaker or implantable cardioverter defibrillator 14. Resting bradycardia \< 55 beats/min 15. Non-study related surgical procedures less than or equal to 7 days prior to administration of study drug. In all cases, the patient must be sufficiently recovered and stable before treatment administration. 16. Females who are pregnant or breastfeeding 17. Refusal to use adequate contraception for fertile patients (females and males) for 12 weeks after the last dose of rociletinib and 2 weeks after the last dose of erlotinib 18. Presence of any serious or unstable concomitant systemic disorder incompatible with the clinical study 19. Any other reason the investigator considers the patient should not participate in the study