— Chicago Blackhawks (@NHLBlackhawks) April 8, 2021
Borgstrom was a first-round pick in 2016 and has spent the 2020-21 season with HIFK in the Finnish Elite League. He has 58 games of NHL experience under his belt.
“We are receiving a very exciting, young player with a bright future in Henrik Borgstrom,” said Blackhawks president and general Stan Bowman in a release. “He is a high-end talent and we think he has the ability to be a big time player for us.
"We also add to our forward depth with an experienced veteran in Brett Connolly and a physical defenceman in Riley Stillman. Connolly is a proven goal scorer and adds some versatility to our front line while Stillman is a young, physical defenceman whose aggressive style brings a different element to our defence.”
Connolly, who won the 2018 Stanley Cup with the Washington Capitals, has two goals and two assists for the Panthers this season. Stillman is pointless in eight games of NHL action in 2020-21.
Carlsson posted two assists in 18 career regular-season games with the Blackhawks. Wallmark had three helpers in 16 games with Chicago this year.