Hischier has been out since February 27th but is set to replace Pavel Zacha in the lineup on Tuesday. Hischier has appeared in just five games this season, scoring two goals and one assist.
Lazar was acquired from the Sabres on Sunday and will be a game-time decision for his Bruins' debut on Tuesday. Lazar centred the fourth line with Sean Kuraly and Chris Wagner in the morning skate.
Lazar has not played since March 31st due to a lower-body injury but will likely serve as a fourth-line option in Boston once he's healthy. Lazar doesn't provide much offensive but was very solid in Buffalo's bottom-6 this year.
Noesen rarely suited up for the Sharks in 2021, appearing in just five games at the NHL-level and 12 with their AHL affiliate. Noesen will likely head to the Toronto Marlies (AHL).
The Devils are anticipating moving a few defenseman ahead of Monday's trade deadline, so Siegenthaler gives them and NHL body to replace anybody they ship out. After appearing in 64 games with the Capitals last year, he has only suited up in seven in 2021, failing to record a point. The 23-year-old is good friend with fellow Swiss native and New Jersey Devil Nico Hischier.