Mutter is an undrafted free agent out of the OHL, where he has scored nine goals with eight assists (17 points) in 44 games between the Hamilton Bulldogs and Kitchener Rangers.
Hinostroza will play for the first time since January 17th, replacing Anders Bjork on the Sabres' fourth line. Hinostroza has scored eight goals with nine assists (17 points) in 36 games this season.
Ratcliffe appeared in 10 games with the Flyers during his call-up, scoring one goal with three assists (four points). Ratcliffe returns to the AHL, where he has 13 points (5G / 8A) in 33 games. Max Willman is expected to replace him in the Flyers' lineup on Thursday.
Frasca was an undrafted free agent centre out of the OHL. The 20-year-old has scored a team-leading 32 goals with 33 assists (65 points) in 44 games with the Kingston Frontenacs this season.