The Bruins’ anticipated trade for Calgary Flames captain Jarome Iginla seemed tantalizingly close to fruition after the disappointing 6-5 shootout loss to Montreal last night, and was in fact reported by TSN to be a done deal.

But at approximately 1:30 early this morning, the tables were painfully turned on the B’s. Calgary, after its 4-3 home win over Colorado, announced it had completed a trade with the Pittsburgh Penguins for the Flames’ long-serving captain.

The details of the deal, as reported by TSN, were Iginla to the Atlantic Division leaders in exchange for college prospects Kenneth Agostino and Ben Hanowski, as well as Pittsburgh’s first-round draft pick.

The original report had stated the Bruins were set to give up defenseman prospect Matt Bartkowski, forward Alexander Kokhlachev and a conditional first-round pick for Iginla in the trade. But for some reason, Calgary changed their mind and dealt with Pittsburgh instead.

Things started to percolate late yesterday afternoon when the B’s, who had six healthy defenseman, called up blueliner Torey Krug from Providence. Then, more tell-tale signs started trickling out.

Bartkowski (signed Tuesday to a one-year, one-way contract extension) was a healthy scratch for the Bruins’ game against Montreal, Kokhlachev was scratched for Providence and then, finally, Iginla was scratched for the Flames’ home game against Colorado. Following last night’s defeat to the Canadiens, Calgary general manager Jay Feaster and assistant GM John Weisbrod (a former Bruins executive who scouted Bartkowski and led the charge to sign him out of Ohio State), reportedly exited the press box at the Saddledome.

Despite being involved in an intense game against the Habs, the B’s players certainly got a whiff of what was going on.

“We’ve heard a little bit about that tonight,” said Brad Marchand. “It’s tough to look into that (news when) walking around and you hear about guys who have been traded. But nothing’s official until it’s announced, and we’re just waiting to see.”

Marchand, nevertheless, gave his wholehearted endorsement of an Iginla acquisition.

“I’ve played against him only one time, but he’s a legend,” said Marchand. “He’s a phenomenal player and he’s such a great leader at every level — here and the Olympics and everything. He’s a guy you’d love to have on your team. He’s definitely a playoff player.