CHICAGO — In arguably one of the busier off-season in recent memory, the Bruins ultimately stood the course.

With Don Sweeney having two holes to fill in a top-six left winger and a top-four left shot defenseman, the third-year Bruins GM was hoping to acquire at least one of those pieces at either the Expansion Draft or the Entry Draft. He was open and willing to part with his first round pick, 18th overall, to get the necessary upgrade(s).

The Expansion Draft came and went with Colin Miller, a right-shot defenseman, being selected by the Golden Knights after two years in Boston. The Entry Draft came and went with the Bruins selecting the 2017 Draft class of Urho Vaakanaianien, Jack Studnicka, Jeremy Swayman, Cedric Pare, Victor Berglund and Daniel Bukac.

The members of the aforementioned draft class may not have been household names on scouting reports. But, the Bruins made the most of their selections that comprised of three defensemen (Vaakanaianien, Berglund and Bukac), two forwards (Studnicka and Pare) and a goaltender (Swayman).

“Both days were good days for the organization,” assistant GM Scott Bradley said in his post-draft press conference on Saturday afternoon. “We targeted specific players, and we came away with some real good prospects.”

The upgrades Sweeney was hoping for, however, did not come in a trade this week. That’s not necessarily a bad thing either given the projected weak pool of prospects during the Entry Draft, as well as the uncertainty of the Expansion Draft aftermath.

After all, the last thing Sweeney needed to do was panic like he did in 2015 when he shipped Dougie Hamilton to Calgary and Milan Lucic to Los Angeles for picks No. 13 and 15. And with Charlie McAvoy and Brandon Carlo ahead of schedule and solidifying the right side of the blue-line, there wasn’t a need to panic, either.

“There are a couple of areas we’d like to address and get better. We’re trying to help our team currently. Certainly, Brandon jumped into our lineup and we hope Charlie will carry over what he did, and we have other players that will push,” Sweeney said following Friday’s first round at the United Center.

“We have six returning defensemen we feel good about and we’ll certainly push from underneath, but it’s an area we’ll continue to address. We have some forwards that we also hope will come online, but we’ll never stop exploring and trying to improve our club.”

A week remains between now and the start of free agency on July 1. Between now and then, the Bruins expect to have a contract extension ready for David Pastrnak. Decisions still remain on whether Ryan Spooner, Dominic Moore and/or Drew Stafford fit into Sweeney’s plans for the 2017-18 season.

Aside from the pending Pastrnak contract extension, the need for the top-four left-shot blue-liner is atop of Sweeney’s to-do list. Though the pipeline is pretty strong on the back end, the Bruins need that veteran upgrade on D to ease Zdeno Chara’s ice time and help youngsters like McAvoy and Carlo in their development as top-four defensemen.

The Bruins have added to their prospect pool, for now. This week, they have to build a team for now.