The Crossover by Kwame Alexander.

Josh is the 12-year-old narrator of The Crossover. His two loves are family and basketball, and his life is full of opportunities to combine them. For example, his dad, a former college player, has trained Josh ever since he could hold a basketball. Along with his brother Jordan, Josh plays on a highly competitive team with the potential to dominate the championships.
Josh’s confidence shines through when he describes his basketball skills. He’s a forward with a fantastic crossover, and his skills earn him the nickname “Filthy McNasty” (a moniker he hates at first but eventually embraces.) His confidence translates into success on the court, and he anticipates a college and NBA career.