The Boston Celtics and guard Payton Pritchard agreed to a four-year, $30 million extension, league sources confirmed to The Athletic on Sunday. Here’s what you need to know: Pritchard, 25, averaged 5.6 points, 1.8 rebounds and 1.3 assists in 13.4 minutes per game across 48 contests last season. But because of his restricted status, it was going to be hard …
