Rinku Singh pitches left-handed but Suraj Sharma, who plays him, throws right-handed. They had to flip the image to make it appear as though he was pitching left-handed.
Cricketer spin bowlers have often traveled to America to work with curveball pitchers. They develop and hone their finger techniques to extract as much spin out of the ball as possible.
Bill Paxton plays Tom House, who not only consulted on the film but also was a real Major League pitcher and coach. House is known for two things in his career: as a coach with the Texas Rangers, he helped Nolan Ryan through the end of his Hall of Fame career. As a young pitcher for the Atlanta Braves, he was in the bullpen when Hank Aaron hit his 715th home run to break Babe Ruth's all-time career home run record. House is seen on film catching Aaron's ball and is then seen at home plate fighting his way through a crowd of people to present Aaron with the ball after he has jogged the bases.
The first rap song played when JB arrives in India is actually not Indian, but Dutch/Turkish.
In the movie, Dinesh Patel's father is a truck driver, while in real life it was Rinku Singh's father.