McIsaac signed a one-year contract with HC Litvinov of the Czech Extraliga on Monday.
McIsaac was traded from Detroit to Boston for Curtis Hall on Friday, according to MLive.com.
McIsaac was placed on waivers by the Red Wings on Friday, according to Elliotte Friedman of Sportsnet.
McIsaac signed a one-year, two-way contract extension with Detroit on Saturday.
McIsaac (head) has earned one assist in two games with AHL Grand Rapids this season.
McIsaac has regained movement in his extremities after he was stretchered off the ice in Sunday's Rookie Tournament loss to Columbus, Helene St. James of the Detroit Free Press reports.
McIsaac (shoulder) was assigned to AHL Grand Rapids on Monday, Helene St. James of the Detroit Free Press reports.
The Red Wings designated McIsaac (shoulder) as a non-roster player Tuesday, Ansar Khan of MLive.com reports.
McIsaac had surgery to repair a left shoulder injury and is facing a 5-6 month recovery.
McIsaac suffered an undisclosed injury and will return from his loan spell with HPK (Finland).