BOSTON — The day proved to be about as quiet as Bruins general manager Don Sweeney predicted, except for a couple of players eager for a change of scenery.

The B’s didn’t land any big names as the NHL’s free agent signing period opened on Saturday, instead adding a pair of players who had a hard time gaining a foothold in their previous organizations. Paul Postma, a 28-year-old defenseman drafted in 2007 by the Jets while they were still the Atlanta Thrashers, signed a one-year contract for $725,000. Winger Kenny Agostino, 25, who could only get a seven-game look from the Blues in 2016-17 despite enjoying an AHL MVP season (83 points with the Chicago Wolves), signed for one year at $875,000.

Both received one-way contracts. The B’s gave a two-way contract, worth $650,000 at the NHL level, to Jordan Swarz, who led their AHL affiliate in Providence with 52 points (22 goals, 32 assists) last season.

The additions, although not major, addressed items on the Bruins’ wish list. Their search for NHL-caliber depth on defense is well-known, and Agostino is seen as having the potential to challenge for a place on the third or fourth line.

“As I said, I’ve been in a bit of a patient position,” said Sweeney, who added he’d remain in conversation with some still-unsigned free agents (including Drew Stafford, whom Sweeney acquired at last season’s trade deadline) and continue to pursue acquisitions via trade.

“Once the dust settles, sometimes there’s a re-set for teams … and we’ll continue to explore. I don’t think things shut down, per se, because it’s July 2.”

Postma, who played a career-high 65 games last season but averaged less than 11 minutes per night, gives the Bruins a fifth right-shot defenseman compared to only two lefties, but also adds an NHL resume (191 career games), experience playing on the off-side and a willingness to play there again.

“I’ve done it in the past, and I feel like I can play that position,” said Postma, who played the left side for two years (2007-08 and ’08-09) with Calgary of the Western Hockey League. “Obviously, I haven’t done it in a few years, but I’m going to practice it the rest of the summer. I’m looking forward to the challenge, and the opportunity.”

Agostino, a Yale University product drafted by Pittsburgh in 2010, had his rights traded to the Flames late in 2012-13, and joined the Blues as a free agent on July 2 of last year. After averaging 50 points over two AHL seasons in the Flames’ organization, he jumped to 24 goals, 59 assists and 83 points last year with the Blues’ affiliate, but only got a seven-game call-up (1-2—3) to St. Louis.

“Hopefully, this is my opportunity to show I belong in the NHL,” said Agostino, who won the 2012-13 NCAA championship at Yale with current Bruins defense prospect Rob O’Gara “I feel ready for that opportunity.”