Brandon Saad, F:Saad was traded back to the Blackhawks as part of the Panarin trade after being acquired from Chicago on June 30, 2015. The 24-year-old had 53 points in back-to-back seasons for the Blue Jackets, with 55 goals and 51 assists in 160 regular-season games. … Sam Gagner, F:After setting an NHL career high with 50 points (18 goals, 32 assists) in 81 games with Columbus, Gagner signed a three-year, $9.45 million contract with the Vancouver Canucks on July 1 as an unrestricted free agent. He was a key part of the Blue Jackets power play, finishing with 18 points (eight goals, 10 assists) on the man-advantage. … Scott Hartnell, F:Columbus bought out the final two years of Hartnell's contract on June 29. The 35-year-old had 37 points (13 goals, 24 assists) in 78 games last season, his lowest total in a full NHL season since 2003-04. The Blue Jackets acquired Hartnell in a trade with the Philadelphia Flyers on June 23, 2014, and he had 146 points (64 goals, 82 assists) in 234 games the past three seasons for Columbus. He signed a one-year, $1 million contract with the Nashville Predators on July 1. … William Karlsson, F:The Vegas Golden Knights selected Karlsson in the NHL Expansion Draft on June 21. The Blue Jackets acquired Karlsson from the Anaheim Ducks in a trade on March 2, 2015. The 24-year-old set an NHL career high with 25 points (six goals, 19 assists) in 81 games last season.