The deal, reported Monday, locks up Bauers through the 2029 campaign and represents one of the larger financial commitments the organization has made to a position player in recent years. Terms were confirmed by people familiar with the negotiations.

Bauers, a left-handed hitter, gives Boston a durable option at first base and adds thump to the middle of the order. The signing signals that the front office views him as a long-term piece rather than a short-term fill-in, a notable shift for a team that has cycled through several first basemen in recent seasons.

For a Red Sox club trying to close the gap in a competitive American League East, the move addresses a clear roster need while committing real money to a player the organization believes can anchor the position. The length of the deal also provides cost certainty at a spot that has been a revolving door.

The contract's average annual value of roughly $14.5 million places Bauers among the team's higher-paid players and reflects both the rising market for power hitters and the club's willingness to spend to compete. Boston has faced pressure from fans and local officials to field a contender, and this signing is among the most concrete steps taken toward that goal this offseason.

Financial details beyond the total value, including any opt-outs, signing bonuses or deferred money, were not immediately disclosed. The team had not announced a formal press conference as of Monday.

The signing comes as the Red Sox continue to evaluate the rest of their roster, with questions remaining about the pitching staff and the rest of the infield. Bauers' arrival likely reshapes how the club approaches the remainder of the winter, potentially freeing up other players to be moved.

For Boston baseball fans, the deal is an early indication that the organization intends to be active and aggressive in building around its core. Whether the investment pays off will depend on Bauers' production, but the commitment itself is unmistakable.