The first of several major trades will happen before the 2025 MLB trade deadline and the Inside the Lines team is here to quantify the impact of each one as they happen

The Seattle Mariners have already added a star first baseman to their roster. Could they also swing a franchise-altering move for MacKenzie Gore?

Grosz has spent the entire 2025 season at high A, posting a 4.14 ERA with 94 strikeouts in 85 innings and holding batters to a .211 average. He has a high-spin fastball that sits in the mid-90s, but the secondary stuff needs improvement, and the command is a tick below average (35 walks).

Matz has transformed a negative, that being his failure to make the Cardinals' Opening Day rotation, into a positive by becoming a nifty utility pitcher. He's recorded at least four outs in 21 of his 29 appearances, and he's done so while generating a 3.29 ERA and a 5.11 strikeout-to-walk ratio.

FOX Sports MLB reporters Rowan Kavner and Deesha Thosar will be grading the biggest trades in the league through the July 31 trade deadline. Here's how every team has done so far: Who else is involved: The Rockies received pitching prospects Griffin Herring and Josh Grosz

Mariners hurler Logan Evans talked the team's trade for Josh Naylor, and his friend, Brandyn Garcia, being included in the trade.

The Seattle Mariners are one step closer to getting Eugenio Suarez. That's because on Friday, the New York Yankees completed a trade for a different third baseman. Colorado's Ryan McMahon is going to the Bronx. Suarez now has one less suitor.