Ryan Sloan, the Mariners’ 19-year-old right-hander in his first season of pro ball, is quickly building a reputation as Seattle’s next great pitching prospect.

The D-backs have agreed to trade first baseman Josh Naylor to the Mariners in exchange for left-handed pitcher Brandyn Garcia (Seattle’s No. 13 prospect per MLB Pipeline) and right-hander Ashton Izzi (No.

Despite already helping the Seattle Mariners out on the big league roster, Keith Law says Cole Young is their most trade-able prospect.

For most of the season, the main talking point for top 100 Seattle Mariners prospect Lazaro Montes has been his power. He flashed the glove in a web-gem play for the Double-A Arkansas Travelers. In the Travelers' 3-2 loss against the Northwest Arkansas Naturals on Wednesday,

The Seattle Mariners could be big-time buyers at the trade deadline, but it might cost them one of their better prospects.

Mariners No. 10 prospect Tai Peete belts his 16th home run of the season, a three-run homer to right, for High-A Everett

The Mariners have eight prospects in the MLB Pipeline Top 100, but are there certain players they aren't willing to move?

The Seattle Mariners have traded for first baseman Josh Naylor from the Arizona Diamondbacks in exchange for left-hander Brandyn Garcia and right-hander Ashton Izzi, the team announced Thursday.