Blackburn (back) was transferred to the 60-day injured list Saturday, per MLB's transaction log.
Blackburn was placed on the 15-day injured list in late August due to a hand injury. He subsequently suffered a back issue and was diagnosed with a spinal fluid leak in mid-September. Blackburn's move to the 60-day IL officially ends his 2024 season. The transaction also clears way on the Mets' 40-man roster for Kodai Senga, who was activated from the 60-day IL in a corresponding move and is set to start Game 1 of the NLDS against the Phillies.