Lettieri was promoted from AHL Providence on Tuesday but subsequently suffered a lower-body injury and won't make the trip for Wednesday's game in Toronto, Joe Haggerty of Boston Hockey Now reports.
Sturm (undisclosed) was injured in the third period of Saturday's game versus the Penguins, and head coach David Quinn did not have an update on the forward's status after the game, Curtis Pashelka of The San Jose Mercury News reports.
Shattenkirk is dealing with a lower-body injury and is expected to miss Thursday's game against the Colorado Avalanche as a result, Alyson Lozoff of Bally Sports West.
The Blues announced that Pernuovich will undergo surgery and will be re-evaluated in six months. Perunovich has been cleared for light contact as of mid-January 2023.
Landeskog returned to skating for the first time as he recovers from knee surgery and is expected to return in January according to Brennan Vogt of Colorado Hockey Now.
The Philadelphia Flyers placed F Sean Couturier on injured reserve. He's expected to miss the next 3-4 months of action. Tentative return range: late February-early March.
Chris Driedger tore his right ACL during the third period of Team Canada's Gold Medal match against Finland during the IIHF World Championships. He has undergone surgery to repair the torn ACL, and he is expected to be sidelined for 7-9 months.