Purpose Sponsorship sales in professional sport is an area of increasing attention and growing investment, but the sport management literature offers only limited research about sales strategies and tactics. As a result, practitioners and academics alike have called for investigation in the area. In response to this need, the purpose of this paper is to empirically explore sponsorship sales in professional sport.Design/methodology/approach Sponsorship sales professionals working for sport properties in the four major North American sport leagues were surveyed on a variety of sponsorship sales-related variables and factors.Findings A total of 92 sponsorship sales professionals responded to the study, for an estimated 15.3 percent response rate. At the time of the data collection, the 92 respondents worked in the National Football League (NFL) (37), Major League Baseball (MLB) (16), National Basketball Association (NBA) (18), and National Hockey League (NHL) (21). A series of practical, conceptual, and comparative results are presented, highlighted by turnover as a problem, the importance of activation/servicing in sponsorship sales, and the high level of investment clubs are making in sponsorship sales.Research limitations/implications First, on “coverage,” the authors acknowledge that variations in the data can be linked, to a large extent, to reporting issues due to the nature of the study, the data, and the sample. Variations in sponsor number or training, for example, are not necessarily indicative of weaknesses in the industry, but occur because of strategic differences among properties. Second, it is important to note that not all properties had personnel respond to the study. Consequently, the figures presented in this study might be a function of the individual personnel who responded rather than a true average figure for a particular league. Third, in terms of the sample, this study deals with a very specific context in the four North American major sport leagues (NFL, MLB, NBA, and NHL). Thus, one should be careful in generalizing to minor professional, collegiate, Olympic, or other sport contexts.Practical implications The finding of this paper states that the turnover of sponsors may be a structural issue and is certainly related to the demand for the particular property (Seaver Marketing Group, 2010). Driven by a number of factors, including technology shifts to digital channels and increased sophistication by the sponsorship sales departments of professional sport properties, a shift in the activation and service paradigm is reported and extended to the specific context of sponsorship sales.Social implications Results show that sport properties in the North American major sport leagues have a strong commitment to sponsorship sales by the organization (commitment of resources), by sport personnel (who support the business side), and by their sponsorship sales professionals who report satisfaction, motivation, and support from their property.Originality/value To the authors’ knowledge, this is the first empirical research study specific on sponsorship sales in professional sport, thus providing direction for practice and future research on an issue of high importance to the sport industry. [ABSTRACT FROM AUTHOR]