Bryce Harper last year's number 1 draft pick in major league baseball is playing well for his minor league team the Hagerstown Suns. However, Hagerstown hasn't filled the Suns park every night to see the future star. Comparing attendance up until this point to previous attendance through June for the last five years shows the team's attendance has jumped maybe 200-300 fans a game, when overall attendance is around a couple thousand. The total impact on attendance may also be reduced if fewer fans go to Suns games this season once Harper is promoted and leaves Hagerstown.
This result is consistent with a paper (Top Prospects and Minor League Attendance) my Towson colleague Tom Rhoads and I published in this month's Journal of Sports Economics, where we find over the last 15 years even the top prospects only increase attendance by a small amount for minor league teams.
See more thoughts on the subject Camden Depot and some other baseball studies.