Sport organisations continue to place a low priority on addressing the exclusion and discrimination experienced by LGBTQ+ people (lesbian, gay, bisexual, trans, questioning/queer, and sexual/gender diverse). It was previously thought this was due to a lack of quantitative evidence of a problem; however, over the past decade, a large body of quantitative research has been conducted, including two international studies, providing strong evidence that discriminatory behaviour remains common in sport and is harmful to this population. In this paper, the authors summarise existing quantitative evidence and consider why sport organisations continue to be slow to address LGBTQ+ exclusion. They argue sport management scholars are in a unique and privileged position to address current resistance to action and drive change through conducting research aimed at identifying pragmatic, practical approaches to end harmful discriminatory behaviours. Finally, the authors describe why such research has the potential to mitigate harm while also advancing the discipline in ways described as being needed by leading scholars.