Dennis Seidenberg made his series debut against the Rangers in Game 5 at TD Garden.
Seidenberg had not played in the first four games because he suffered a lower-body injury on his first shift of Game 7 against Toronto on May 13.
The No. 2 defenseman practiced with his teammates for the first time last Sunday at TD Garden.
Seidenberg skated every day after that in practices and morning skates. Full story for BostonGlobe.com subscribers.