Transactions & Injuries
          
            
  
    
          
              
    | Date | Description | |
|---|---|---|
| 2025-26 | ||
| 2025-10-28 | 
                          
                 
              
            
                          Assigned to the Providence Bruins (AHL).
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| 2025-10-22 | 
                          
                 
              
            
                          Recalled from the Providence Bruins (AHL).
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| 2025-10-03 | 
                          
                 
              
            
                          Placed on waivers by the Boston Bruins for the purpose of being assigned to the Providence Bruins (AHL).
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| 2024-25 | ||
| 2025-06-29 | 
                          
                 
              
            
                          Signed by the Boston Bruins to a one-year two-way contract extension.
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| 2025-04-14 | 
                          
                 
              
            
                          Assigned to the Providence Bruins (AHL).
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| 2025-03-31 | 
                          
                 
              
            
                          Recalled from the Providence Bruins (AHL).
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                  |
| 2025-03-30 | 
                          
                 
              
            
                          Assigned to the Providence Bruins (AHL).
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                  |
| 2025-03-18 | 
                          
                 
              
            
                          Recalled from the Providence Bruins (AHL).
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                  |
| 2025-02-28 | 
                          
                 
              
            
                          Assigned to the Providence Bruins (AHL).
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                  |
| 2025-02-18 | 
                          
                 
              
            
                          Recalled from the Providence Bruins (AHL).
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                  |
| 2025-02-08 | 
                          
                 
              
            
                          Assigned to the Providence Bruins (AHL).
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                  |
| 2025-01-14 | 
                          
                 
              
            
                          Recalled from the Providence Bruins (AHL).
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                  |
| 2024-09-29 | 
                          
                 
              
            
                          Assigned to the Providence Bruins (AHL).
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| 2024-07-12 | 
                          
                 
              
            
                          Re-signed as a restricted free agent by the Boston Bruins to a one-year two-way contract.
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| 2023-24 | ||
| 2024-06-30 | 
                          
                 
              
            
                          Boston Bruins tendered a qualifying offer.
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| 2024-05-16 | 
                          
                 
              
            
                          Recalled from the Providence Bruins (AHL).
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                  |
| 2023-10-03 | 
                          
                 
              
            
                          Assigned to the Providence Bruins (AHL).
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| 2022-23 | ||
| 2022-10-04 | 
                          
                 
              
            
                          Assigned to the Providence Bruins (AHL).
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| 2021-22 | ||
| 2022-03-14 | 
                          
                 
              
            
                          Signed by the Boston Bruins to a two-year entry-level contract.
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| 2022-02-22 | 
                          
                 
              
            
                          
                Acquired from the Arizona Coyotes
              
                       | 
                      The Boston Bruins acquired defenseman Michael Callahan from the Arizona Coyotes for a seventh-round draft pick in 2024. | 
| 2017-18 | ||
| 2018-06-23 | 
                          
                 
              
            
                          Drafted by the Arizona Coyotes in the 5th round (142nd overall) in 2018.
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