**Jason Kelce stands as the clear frontrunner to serve as best man, with Patrick Mahomes widely expected among the groomsmen, driven by longstanding family ties and on-field brotherhood.** Travis has repeatedly positioned his older brother as a top choice—Jason publicly expressed hope for the role on the Bussin’ With the Boys podcast in 2025, noting Travis’s large circle of friends—while Mahomes, who included Kelce in his own 2022 wedding party, shares a “family” bond that traders view as near-certain inclusion. Speculation also points to other Chiefs teammates or childhood friends, but no official wedding party has been confirmed. Wedding planning remains fluid amid Kelce’s uncertain playing future and unverified July 2026 timing rumors (including possible Madison Square Garden events), leaving the exact lineup open until formal announcements or the ceremony itself. Traders should monitor any joint statements or insider reports on guest lists for shifts in implied probabilities.