Upton landed on the pommel, the front, of the western saddle and cracked his ribs.
Yesterday there was a minute's silence to acknowledge the contribution of long time rodeo supporter Viv Dobson, who died last year.
Bradshaw said police were called on Saturday after animal activists breached a ban on filming with high-definition cameras.
Police confirmed they were called to the grounds but no arrests had been made. Most of the protesters stood at the main gates with placards expressing their concerns about the sport.
Direct Animal Action spokesperson Apollo Taito said the ban was typical of rodeo cowboys who didn't want wider New Zealand to know what really went on at rodeos.
"There is a lack of transparency in rodeo that's seriously concerning. What are they hiding? Are they afraid another animal will die today and it will be caught on camera?
"Rodeo is beyond appalling and we've had a gutsful of cowboys abusing animals for fun."
Rodeo is a competitive sport that arose out of the working practices of cattle herding in Spain, Mexico, and later Central America, South America, the United States, Canada, Australia and New Zealand.