The 25-year-old Abdelkader had eight goals and 14 assists in 81 games last season for Detroit. He's played 209 games for the Red Wings over the last five seasons.
The 29-year-old Colaiacovo was a free agent after appearing in 370 games in nine NHL seasons for the Toronto Maple Leafs and St. Louis Blues. He had two goals and 17 assists in 64 games for the Blues in 2011-12.
Right now I'm just happy to be back and get through this season and make sure I do my job. I've never had an issue with having to prove myself again and I'll try to do it again. We'll see where it takes me.
— Defenseman Torey Krug on signing with the Boston Bruins