Red Sox sign INF Marcelo Mayer — Grade C

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About this MLB transaction

The Red Sox completed a transaction involving Marcelo Mayer (INF) on June 26, 2026. FanVerdicts covers every reported MLB move — and asks fans to weigh in on each one. Cast your Fan Verdict on this move, see where the crowd lands, and argue the call. FanVerdicts brings its own read too — sentiment and Contract Value Index — as one honest input alongside the crowd's. Where FanVerdicts has weighed in so far: Sentiment C.

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