What happened: The proposal would send Mason Lohrei and a 2028 fifth-round pick to Pittsburgh. Boston would receive Charlie Trethewey’s signing rights and a 2028 second-round pick.
Why it matters: Pittsburgh would gain immediate blue-line help, while Boston would add a longer-term prospect and improve its draft position. The concept remains hypothetical with the 2026-27 opener set for Sept. 29.
By the numbers: Lohrei carries a $3.2 million cap hit through 2026-27. The package would move Boston up three rounds in the 2028 draft.
What to watch: Lohrei’s role in Boston’s training-camp competition is the next concrete marker before the season opens.