The 30-year-old Dickinson, of Georgetown, Ont., had six goals and seven assists in 47 games with the Blackhawks this season, his fourth in Chicago. He joins his fourth NHL team after previous stints with the Dallas Stars and Vancouver Canucks.
The six-foot-four Dach, 23, has three goals and six assists in 53 games this season.
Mangiapane signed a two-year, $7.2-million contract with the Oilers last off-season, but the former 35-goal scorer with the Calgary Flames has only seven goals and seven assists in 52 games this season. The Oilers placed the 29-year-old from Toronto on waivers Sunday.
Edmonton also announced Wednesday it has placed forward Curtis Lazar on long-term injured reserve.
This report by The Canadian Press was first published March 4, 2026.
The Canadian Press