Steve Francis and Antoine Walker are riding horses. They are doing something called show jumping. Show jumping is a sport where you ride around and get the horse to jump over fences and things like that. Usually when riders are jumping competitively, they dress up in fancy clothes. Steve Francis and Antoine Walker are just riding for fun, though, so they are wearing what they normally wear - basketball uniforms.
Below: Antoine Walker and his horse know a little bit about jumping, too.
Antoine Walker and Steve Francis always make sure to wear their helmets - Antoine Walker has on his usual bat helmet, and Steve Francis is wearing the World War I flying helmet he loves so much.