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.
I spent a long summer thinking about that playoff series and what could have been. [The Blackhawks] ended up being the Stanley Cup champions, so we know we lost to a very good team. It's tough to know how close we were, and it motivates us for this year.
— Nashville captain Shea Weber in an interview with the Predators website