Why did the Boston Bruins trade for two rookies?

BUFFALO — The Bruins acquired two prospects and a prospect in the deal that sent winger James van Riemsdyk and defenseman Ben Lovejoy to the Buffalo Sabres.

The two players were among several players acquired during the Bruins trade deadline.

Boston acquired van Riemerksdyk, a third-round pick (No. 53) in the 2018 NHL Entry Draft, from the Toronto Maple Leafs for forward Tyler Johnson and forward Andrew MacDonald.

The 21-year-old Johnson has played in 11 NHL games with Toronto, tallying one assist.

He has a goal and four assists.

MacDonald has six points (two goals, two assists) in 14 games with Buffalo this season.

The 26-year old Lovejoy has played one game with Buffalo, tallyning two assists.

He is a first-round draft pick (19th overall) in 2017.

Lovejoy, a second-round (No: 123) selection in 2016, has two assists in 11 games with the Sabres this season and is on pace for a career-high 27 goals and 67 points.

The Sabres also acquired winger Mark Barberio, a seventh-round selection (No.: 87) in 2016.

Barberio has six goals and 14 points in 27 games with Minnesota this season, and has seven assists in 40 career NHL games.

The Bruins also acquired defenseman Alex Goligoski, a fifth-round round (No, 71) in 2015, from Toronto in exchange for a conditional fourth-round choice (No., 81) in 2018.

The 27-year, 202-pound Goligaski was the seventh overall pick in the 2015 NHL Entry Play.

He was drafted by Boston in the third round (157th overall), 210th overall, by the Toronto Marlies of the Ontario Hockey League last season.

He has appeared in seven games for the Marlies this season with four goals and seven points.