Still only 20 years old, Carlo is already a fixture on Boston’s blue line after finishing up the 2016-17 regular season with six goals and 16 points in a full 82 games. The 6-foot-3, 203-pounder -- a second-round pick in 2015 -- was paired with veteran Zdeno Chara (who’s old enough to be his father) and more than held his own in the process, logging an average of 20:49 on the ice per game. While Carlo isn't a dynamic force on offense, he can contribute some on that front as well as some PIM (59 last year), and most of the trade rumors that swirled around the Bruins this offseason referenced the 6-foot-5 defender as a possible chip. Short of a stunning offer, the Bruins are in no mood to move Carlo, a potential shutdown rearguard who’s being groomed to serve as a future pillar of the team’s blue line.