DEAL ACCEPTED: Seattle Mariners Second Baseman Miles Mastrobuoni Signs a 4….

Seattle, WA — June 18, 2025

The Seattle Mariners have made a major commitment to their infield core, announcing that second baseman Miles Mastrobuoni has signed a 4-year contract extension that will keep him in Seattle through the 2029 MLB season.

The deal, reportedly worth $18 million with performance-based incentives, rewards Mastrobuoni for his consistent play and growing role within the Mariners’ clubhouse. Known for his versatility, speed, and reliable glove, Mastrobuoni has emerged as a key contributor in the Mariners’ playoff push this season.

“Miles brings a steady presence to our lineup and defense,” Mariners GM Justin Hollander said. “He plays the game the right way, and we’re excited to have him in a Mariners uniform for the foreseeable future.”

Mastrobuoni, 29, joined Seattle via trade from the Chicago Cubs and has since become a fan favorite for his gritty play and clutch performances. This season, he’s batting .276 with 5 home runs, 32 RBIs, and 14 stolen bases through 72 games, while also logging innings at second base, third, and left field.

“I’m grateful for the opportunity and trust this organization has shown me,” said Mastrobuoni. “Seattle feels like home now, and I’m excited to keep building something special here.”

The Mariners, currently battling for the top spot in the AL West, are hoping Mastrobuoni’s leadership and versatility will help carry them deep into October.

Seattle, WA — June 18, 2025

The Seattle Mariners have made a major commitment to their infield core, announcing that second baseman Miles Mastrobuoni has signed a 4-year contract extension that will keep him in Seattle through the 2029 MLB season.

The deal, reportedly worth $18 million with performance-based incentives, rewards Mastrobuoni for his consistent play and growing role within the Mariners’ clubhouse. Known for his versatility, speed, and reliable glove, Mastrobuoni has emerged as a key contributor in the Mariners’ playoff push this season.

“Miles brings a steady presence to our lineup and defense,” Mariners GM Justin Hollander said. “He plays the game the right way, and we’re excited to have him in a Mariners uniform for the foreseeable future.”

Mastrobuoni, 29, joined Seattle via trade from the Chicago Cubs and has since become a fan favorite for his gritty play and clutch performances. This season, he’s batting .276 with 5 home runs, 32 RBIs, and 14 stolen bases through 72 games, while also logging innings at second base, third, and left field.

“I’m grateful for the opportunity and trust this organization has shown me,” said Mastrobuoni. “Seattle feels like home now, and I’m excited to keep building something special here.”

The Mariners, currently battling for the top spot in the AL West, are hoping Mastrobuoni’s leadership and versatility will help carry them deep into October.

Seattle, WA — June 18, 2025

The Seattle Mariners have made a major commitment to their infield core, announcing that second baseman Miles Mastrobuoni has signed a 4-year contract extension that will keep him in Seattle through the 2029 MLB season.

The deal, reportedly worth $18 million with performance-based incentives, rewards Mastrobuoni for his consistent play and growing role within the Mariners’ clubhouse. Known for his versatility, speed, and reliable glove, Mastrobuoni has emerged as a key contributor in the Mariners’ playoff push this season.

“Miles brings a steady presence to our lineup and defense,” Mariners GM Justin Hollander said. “He plays the game the right way, and we’re excited to have him in a Mariners uniform for the foreseeable future.”

Mastrobuoni, 29, joined Seattle via trade from the Chicago Cubs and has since become a fan favorite for his gritty play and clutch performances. This season, he’s batting .276 with 5 home runs, 32 RBIs, and 14 stolen bases through 72 games, while also logging innings at second base, third, and left field.

“I’m grateful for the opportunity and trust this organization has shown me,” said Mastrobuoni. “Seattle feels like home now, and I’m excited to keep building something special here.”

The Mariners, currently battling for the top spot in the AL West, are hoping Mastrobuoni’s leadership and versatility will help carry them deep into October.