Seven former New York Rangers, the six mentioned above plus Bruins defenseman Nick Holden, a healthy scratch in Boston's 6-2 win in Game 1, are playing in the Eastern Conference Second Round.
Game 2 is Monday at Amalie Arena (7 p.m. ET; NBCSN, CBC, TVAS).
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"It is definitely a little bit different," Girardi said. "It's weird how things work out."
McDonagh and Miller were traded to Tampa Bay together Feb. 26 as part of the Rangers purge before the 2018 NHL Trade Deadline. Girardi signed a two-year contract with the Lightning last summer after the Rangers bought out his contract. Stralman signed with the Lightning on July 1, 2014, and Callahan was traded to Tampa Bay on March 5, 2014.
The Bruins' ex-New York duo, Nash and Holden, were traded to Boston five days apart; Holden on Feb. 20 and Nash on Feb. 25.
"It's always weird going against that former team or against guys you played a lot of years with," Nash said. "We had some good years with our former team. At the end of the day, though, once you get on the ice it's just the front of the sweater that matters, not the back."
They played with the same logo on the front for a long time. The seven played in a combined 2,787 games with the Rangers, scoring 1,230 points (467 goals, 763 assists). In addition, they played in 456 Stanley Cup Playoff games, scoring 167 points (50 goals, 117 assists).
Girardi is first on the Rangers' all-time list for playoff games played (122). McDonagh is fourth (96). Girardi is also ninth on the Rangers' all-time list for regular-season games played (788). McDonagh is 30th (516).