The Red Wings have shifted him to left wing, though he will play center against Columbus with Frans Nielsen out and Andreas Athanasiou doubtful because of injuries.
"It's more learning how to be that same big, strong guy against bigger and stronger people," Blashill said. "There's two ways to do that. One's technique, and one's strength and power."
When Rasmussen has played, he has averaged 12:39 of ice time, including 2:29 on the power play, fourth among Detroit skaters.
When he has not played, it has been strategic. The Red Wings had three off days before Rasmussen was scratched against the Winnipeg Jets at Little Caesars Arena on Friday, then an off day at home afterward.
With extra time, including time to recover physically before the next game, Rasmussen could work out his legs and core with strength and conditioning coach Mike Kadar. He could work on his cutbacks, edges and moves down low with Naurato. He could study video with Blashill, who showed him two things.
"One is skating with the puck from the top of the circle to the top of the circle," Blashill said. "When he gets the puck he's got to play at a fast pace in those areas. You can slow it down once you get over the top of the circle, but this League's too fast to stand still when you get the puck.
"And two, ways to use his body to knock people off their kilter a little bit so he can maintain possession of the puck and make plays off the cycle."
Rasmussen returned to the lineup against the Dallas Stars on Sunday. Blashill said he was excellent, pinpointing five positive plays he made, like recovering the puck off the face-off on the power play and protecting the puck with his body along the wall.
The extra work apparently paid off.
"I think I'm definitely seeing progress," Rasmussen said.
Rasmussen has not scored yet, but by one count he has had four near-misses around the net. The thought is that he has put himself in the right spots, and once his head and hands catch up to the NHL pace, chances will become goals.
If he starts producing he'll stay in the NHL. If not, the Red Wings will have to decide if he would be better playing World Juniors and going to the WHL.
The important thing is not where he is this season, but where he is in seasons to come.