Sports coach involved in face-to-face instruction today account for the majority of salaried employees in the sports sector. Their ever-growing number could be taken for a sign of the dynamism of this sector of employment. However, the ubiquity of part-time work raises concerns over the quality of these jobs. How should we understand this phenomenon? What are its impacts on career paths and professional expectations? The results of this research, based on interview research of part-time employees (n=44) and employers (n=29), point out the prevalence of situations of underemployment along with cases of selected secondary employment logics. Between precariousness of integration and exclusion, fragility and satisfaction, professional trajectories reveal an ambivalent professional sector based on “in between” jobs.