Del Mastro is a big, physical, solid stay-at-home defenseman. He’s a big body that any coach would want in their defensive core. His game in his own end is amongst the best in this draft class. He has some of the best awareness of any draft-eligible player along with an abundance of physicality not often seen in prospects at this age. He utilizes every inch of his 200-pound frame effectively when his team needs him to step up. Whether it’s laying the body, using his long reach to present himself as a threat on the forecheck, blocking shots, or being a menace to play against on the power play. He uses his massive reach to his advantage on the forecheck using his size and range for stick-checking to stop offensive chances from his opponents while also blocking shots whenever the opportunity presented itself. He has great gap control and is good at keeping his opponent to the outside to limit the angle on net. Down low in his own zone, he defends very well thanks to good positioning and good use of his size to tie up or box out his man in front. With the puck on his stick, Del Mastro is confident enough to rush up the ice and attacked open lanes with ease. He plays with poise even when he is being pressured by multiple opponents. He can still find a way to connect a pass, take a shot, or make a decision to move the play forward. This poise is also present in the defensive zone where he consistently was finding ways to get pucks out of his own end either by barreling through his opponents or by simply making a stretch pass down the ice.  He has a good eye for passing lanes, and more often than not, he connects when he dishes out the puck towards his teammates. His shooting has the most room for improvement as he does possess power but his accuracy does need to be improved, as does his shot timing and selection. His skating also does need a bit of work as he doesn’t have either high-end speed or smooth edge work. Whether it’s straight skating or a change in direction, Del Mastro skates with big heavy strides but he needs to work on his agility and further his movement capabilities on the ice.

– FCHockey’s 2021 NHL Draft Guide