The Boston Celtics have agreed to a training camp deal with former 2016 second-round pick Jake Layman, who has played for the Portland Trail Blazers and Minnesota Timberwolves. View the original article to see embedded media. While they did just recently make the NBA Finals, the Boston Celtics have been really busy this NBA offseason. Not only did they upgrade their bench with the addition of former 2016-17 Rookie of the Year Malcolm Brogdon from the Indiana Pacers, but the Celtics have been making some other smaller moves as well to add scoring talent to their roster. Signing veteran forward…