Boston Stanton plays high school basketball with a relentless energy that often leaves the Denver East senior gasping for air when he finishes a fast break or sprints back in transition. Lately, it’s been difficult to catch his breath. High school players all across Colorado can relate. With high school basketball practices underway, and games starting Monday in a season abbreviated due to COVID-19, teams are grappling with a rule change mandating masks worn by all players during games. Stanton, among the state’s top boys basketball players, is conscious of health concerns that led to the mask requirement.