Hossa has been ruled out two to three weeks with what the team is calling a lower-body injury. The winger was injured during practice Monday when he collided with defenseman Nick Boynton.
"Things happen like that," coach Joel Quenneville said Tuesday before the Hawks hosted the St. Louis Blues. "It happened away from the game too. It's all part of it. You deal with it."
Quenneville said Hossa's injury is not related to his previous injuries with the Hawks. Hossa missed five games with an upper-body injury earlier this season. Two summers ago, he underwent shoulder surgery.
Hossa was favoring his right leg after the collision with Boynton. He needed help off the ice from the Hawks training staff. Hossa sprained his right MCL in the Stanley Cup Finals against the Philadelphia Flyers. He played through it and rehabbed it over the summer.
Morin was recalled from the Rockford IceHogs to take Hossa's place in the lineup. He leads Rockford with six goals, including four on the power play.
The lines at Tuesday's morning skate include:
Viktor Stalberg -- Jonathan Toews -- Patrick Kane
Troy Brouwer -- Patrick Sharp -- Morin
Bryan Bickell -- Dave Bolland -- Tomas Kopecky
John Scott -- Jake Dowell -- Jack Skille
"It's an opportunity for Morin to come up and hopefully he can take advantage of the chance and the challenge," Quenneville said. "He's got some skill."
Fernando Pisani's upper-body injury is not serious. He's considered day-to-day. He will not play against the Blues Tuesday.