Final answer:
The NFL gets the largest share of revenue from ticket sales due to the higher number of games played and the high demand for tickets.
Step-by-step explanation:
The pro league that gets the largest share of revenue from ticket sales is the NFL (National Football League).
The NFL generates a significant portion of its revenue from ticket sales because of the larger number of games played by each team and the high demand for tickets. The league's popularity and fan base also contribute to the higher revenue from ticket sales.
On the other hand, the NBA (National Basketball Association), MLB (Major League Baseball), and NHL (National Hockey League) rely more on other revenue streams such as broadcast rights and sponsorships.