Going into the offseason, the Seattle Mariners' front office made it clear that its top priority was to bring back first baseman Josh Naylor in free agency.

Mission accomplished.

According to a report on "X" from ESPN's MLB insider Jeff Passan on Sunday, the Mariners and Naylor are finalizing a five-year contract, which will keep Naylor on the team through 2030. There was no information immediately available on the total value of the contract, but a collaborative report from Ryan Divish and Adam Jude of the Seattle Times said it's expected to be the largest deal a free agent position player has signed with the M's since Jerry Dipoto joined the front office in 2015.

Most publications projected a three- or four-year deal for Naylor in free agency. But according to Passan's reporting, Naylor's play in the second half secured him a spot as one of the team's foundational pieces.

"The Mariners made Josh Naylor their top priority entering the winter," Passan said in a post on "X." "(And) his excellence down the stretch got him a long-term deal to join Cal Raleigh, Julio Rodríguez and the Mariners’ rotation as a foundational piece. His energy was infectious. Seattle didn't want to lose it."

Naylor is the first big domino to fall in free agency and he was also the first major player to be moved at the trade deadline.

The Mariners acquired Naylor in a deal with the Arizona Diamondbacks on July 24. Seattle sent minor league pitching prospects, left-hander Brandyn Garcia and right-hander Ashton Izzi, to Arizona in return.

Naylor finished the season with 81 runs in 147 games and hit 29 doubles, a triple and 20 home runs with 92 RBIs. He slashed .295/.353/.462 with an .815 OPS.

With the Mariners, Naylor crossed home plate 32 times in 54 games and hit 10 doubles and nine homers with 33 RBIs. He slashed .299/.341/.490 with an .831 OPS and was a perfect 19-for-19 in stolen bases attempts.

The 2024 All-Star continued his success into the postseason. He scored seven runs in 12 games and hit two doubles and three home runs with five RBIs. He slashed .340/.392/.574 with a .966 OPS.

With his new deal, Naylor will be a part of a foundation that extends through the rest of the decade, which includes MVP finalist and All-Star catcher Raleigh and three-time All-Star center fielder Rodriguez. The club's starting rotation, which includes four respective All-Stars, is also under team control for the next several years.

RELATED MARINERS STORIES

MARINERS TAKE INTERESTING APPROACH WITH TOP 100 PROSPECT: The Mariners won't force switch-pitcher Jurrangelo Cijntje to drop his ambidextrous approach. CLICK HERE

FINAL GRADES: ANDRES MUNOZ: There were very few relievers in baseball last season better than the two-time All-Star. CLICK HERE

MARINERS OUTFIELDER GETS CLOSER TO POTENTIAL RAISE: A provision in the three-time All-Star's contract could guarantee him a big pay day in the future. CLICK HERE

JOIN THE CONVERSATION

Remember to join our MARINERS on ROUNDTABLE community, which is FREE! You can post your own thoughts, in text or video form, and you can engage with our Roundtable staff, as well as other Mariners fans. If prompted to download the Roundtable APP, that's free too!