Tight end Rob Gronkowski's contract with the New England Patriots has language that allows the team to prevent him from "engaging in any activity other than football which may involve a significant risk of personal injury," according to a report by Ben Volin of the Boston Globe. That's about as specific as the clause gets.
The San Francisco 49ers are more specific in their contracts while defining the types of activities that aren't allowed. Volin reports that, according to copies of the new contracts signed by Jimmy Garoppolo and Richard Sherman, 49ers players are not permitted to engage in the following activities.
Skydiving
Hang gliding
Rock or mountain climbing
Racing of any kind including as a driver or a passenger
Motorcycling
Use of any off-road or all-terrain vehicle
Professional wrestling
Boxing
Firearms
Scuba diving
Jet skiing
Surfing
Bungee jumping
Diving
Snow or water skiing
That's a pretty extensive list. "Gronk is lucky he doesn't play for the 49ers," writes Volin.
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