Palo Verde High grad Bryce Cotton begins his NBA career Monday when the San Antonio Spurs open practice for 2014-15. Cotton, an All-Big East standout at Providence, is one of 19 players on the Spurs’ roster; 15 will make it to opening day. Fifteen players have fully guaranteed contracts; Cotton does not. He is likely to open his pro career with the NBA D-League’s Austin Toros.