It's been a roller-coaster season for the 19-year-old rookie. After struggling for most of the season, Seguin was a healthy scratch throughout the first two playoff series.
But with Patrice Bergeron going down with a concussion, it opened up a roster spot for Seguin in the first two games of the Eastern Conference final versus the Tampa Bay Lightning. He's responded to joining the lineup by tallying six points in the two games, including a four-point, two-goal effort on Tuesday.
NESN's Andy Brickley and Barry Pederson saw a lot of maturity out of Seguin in Game 2. To hear what they had to say about the youngster's impressive performance, check out the video above from Bruins Overtime Live.