It wasn't the biggest trade of that season's deadline, but one could argue that Chris Kelly's arrival in Boston had a huge impact on that 2011 team.
As the 2011 trade deadline approached, the Bruins looked like a legitimate Cup contender. There was no real powerhouse Cup favorite in the league that year, and the first-in-the-Northeast Bruins appeared to have as good of a shot as anyone.
As a result, the Bruins were involved in acquiring everyone available at the deadline: Tomas Kaberle. Chris Philips. Bobby Orr. Wayne Gretzky.
Rumors were flying as to who was coming to Boston, and as the calendar flipped closer to the actual deadline, the rampant speculation only intensified.