This study examined how conforming to traditional, Black, and athlete-based masculine norms impacts self-stigma of help-seeking. Social support was examined as a buffer between self-stigma and willingness to seek help. Participants were from NCAA Divisions I, II, and III men's sports teams. Hypotheses were (1) after accounting for control variables (contact vs. non-contact sports, prior mental health treatment vs. no prior mental health treatment, and knowing someone who has sought mental health treatment vs. not knowing someone), greater adherence to traditional masculine norms will positively predict self-stigma of help-seeking, (2) after accounting for control variables and traditional masculine norms, greater adherence to Black masculine norms and athlete-based masculine norms will positively predict more self-stigma of help-seeking, (3) greater self-stigma of help-seeking will predict less willingness to seek help, (4) social support related to help-seeking will moderate the relationship between self-stigma of help-seeking and willingness to seek help, such that (4a) among individuals with low social support related to help-seeking, there will be a significant, moderate, negative relationship between self-stigma of help-seeking and willingness to seek help and (4b) among individuals with high social support related to help-seeking, there will still be a significant, but small, negative relationship between self-stigma of help-seeking and willingness to seek help. A regression analysis was used to test hypotheses 1, 2, and 3, the Hayes (2013) PROCESS macro model was used to test hypothesis 4. Results revealed greater adherence to traditional, Black, and athlete-based masculine norms did not positively predict self-stigma of help-seeking. Greater self-stigma of help-seeking predicted less willingness to seek help and social support for help-seeking did not moderate the relationship between self-stigma of seeking help and willingness to seek help. Implications for future research and study limitations are discussed. [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.]