This paper examines the relationship between the representation of marathon runners in a fund management team and its future performance. We find that funds with a larger proportion of runner managers have a higher level of risk-adjusted excess returns. We also find that these funds have a lower level of the disposition bias, deviate more from their benchmark portfolios, hold fewer stocks in their portfolios, and hold their stocks for a longer duration. Also, they tend to hold more stocks that are about to experience desirable earnings outcomes. Overall, the results suggest that personality traits that affects achievement in other dimensions of life may translate into fund management success. • Fund managers who run marathons deliver higher risk-adjusted returns. • Runner managers have less disposition bias and are more prompt to exit losing positions. • Runner managers have higher active share and longer duration, and hold fewer stocks. • Runner managers tend to hold more stocks that are about to experience desirable earnings outcomes.