What happened: The Seattle Mariners acquired a player from the San Francisco Giants, adding infield and right-handed hitting depth to the roster. The move bolsters Seattle's bench as the club sits at .500 in a crowded American League picture.

Why it matters: With the lineup leaning heavily one way, the addition gives Seattle more right-handed balance and infield flexibility down the stretch. For a team treading water at 42-42, marginal depth upgrades can swing tight games in a packed wild-card race.

What to watch: Watch for a corresponding roster move and how Seattle deploys the new addition once the trade is finalized.