What happened: A Yahoo MLB roundup frames the start of Red Sox trade rumor season, noting Marcelo Mayer is now officially the team's shortstop "for now." The piece flags that there are far fewer questions about Mayer's defense than about his offensive production at the plate.

Why it matters: With the Red Sox trade timeline already taking shape, Mayer's bat becomes a swing factor in how aggressively Boston shops the roster. A young shortstop secure on defense but unproven offensively shapes both the lineup and any deadline calculus.

What to watch: Watch Mayer's offensive splits over the coming weeks and whether his bat firms up his hold on the everyday shortstop job as the trade market heats up.