Boston Red Sox reached $6.7 billion valuation, up from $4.8 billion, reflecting a 38.5 percent surge that outpaces MLB median growth. Per Sportico data, the jump stems from Fenway Park's expanded premium seating, hospitality revenue acceleration, and regional sports network stabilization under Fenway Sports Group ownership. The $1.9 billion gain positions the Red Sox above mid-market peers but trails Yankees ($9B+) and Mets ($8.5B+), signaling runway for further appreciation as stadium modernization reaches full revenue potential.