The purpose of this quantitative study was to examine the relationship between career adaptability resources (Career Adapt-Abilities scale score and subscale scores) and the persistence rates among undecided students at a large, public four-year university in the Midwest of the United States of America. Data from the 2019 cohort of first-time, full-time, degree-seeking undecided students (n=486) were examined. Using a non-experimental approach, the researcher analyzed descriptive statistics and logistic regression models to answer the research questions: (1) Does the career adapt-ability score or the career adapt-ability sub scales (concern adaptability, control adaptability, curiosity adaptability, confidence adaptability), predict retention among undecided college students? (2) How do background characteristics influence the relationship between career adapt-ability scale score and subscale scores and prediction retention? Tinto's (1975, 1987a, 1993) student integration model, Bean's (1980, 1982) student attrition model, and Savickas' (2013) career construction theory served as guiding frameworks for this study. Based on the results of this study, Career Adapt-Abilities Scale (CASS) overall and subscale scores alone did not predict retention at the same institution; however, CAAS subscale scores of concern and confidence do predict retention at any institution. High school grade point average (GPA) predicted retention in all logistic regression models. Pell grant eligibility determined by the students' expected financial contribution (EFC) predicted retention with high school GPA at the same institution. On-campus housing along with high school GPA and CAAS subscale scores of concern and confidence predicted retention at any institution when included. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]