We investigate the level of influence the scrum master role has on a team’s success, in terms of four different leading indicators: feature lead time, defect leakage, predictability and velocity. We use statistical analysis on a large data set of agile metrics, collected by the target company, a large corporation in the Nordics. Our study showed that primarily the presence of a scrum master correlates well with team success for feature lead time. The remaining three indicators did not show strong statistical correlation with the inclusion/exclusion of a scrum master. However, these indicators should not be excluded for data-driven decision making, and need further research to identify obstructive or external factors that may influence either the scrum master’s presence or the leading indicators’ reliability.