"I think, in a lot of ways, they give us more options," Blashill said Thursday. "We think they fit in with our team and bring some unique skills."
The Red Wings signed Green to a three-year contract and Richards to a one-year contract Wednesday, the first day of NHL free agency. Green's contract is worth $18 million, and Richards is guaranteed $3 million for the 2015-16 season but could make $4 million with bonuses, according to TSN.
Blashill is going into his first season as Red Wings coach after replacing Mike Babcock, who left Detroit after 10 seasons to coach the Toronto Maple Leafs.