Chiarot was hurt in Saturday's game, left briefly but finished the game. Landing on IR may be precautionary, as he is also one of their big trade deadline chips. Corey Schueneman was recalled from Laval (AHL) and will play on Sunday.
Watson will not be available for Sunday's game in Washington or Tuesday's game vs. the Blues. Watson will likely be replaced by Clark Bishop in the bottom-6 on Sunday. He'll be eligible to return Thursday in Buffalo.
Gustafsson played in 10 straight games but will be replaced by Jakub Galvas in the lineup on Wednesday. Gustafsson had registered one goal and six assists (seven points) in his previous 10 games.
Lagesson went to the AHL during the All-Star break but is expected to be in the lineup on Tuesday. Lagesson will likely continue to play for Kris Russell, who was moved to IR in a corresponding move on Monday.