NBA legend John Stockton drew the ire of basketball fans Thursday when it was discovered he appeared in a documentary questioning the efficacy of masks and the COVID-19 vaccine to prevent the spread of the virus that has killed more than 3.8 million people globally.NBA legend John Stockton drew the ire of basketball fans Thursday when it was discovered he appeared in a documentary questioning the efficacy of masks and the COVID-19 vaccine to prevent the spread of the virus that has killed more than 3.8 million people globally.