Stressed-out groom-to-be Travis Kelce is fumbling under the pressure of his high-profile romance with Taylor Swift , his pro football career and his many extracurricular activities, RadarOnline.com can reveal.

Teammates and fans were alarmed when the Kansas City Chiefs tight end, 35, threw his helmet to the ground and yelled, "I'm sick of this s**t!" during a game against the Philadelphia Eagles on September 14, even though his team was three points ahead at that point. The Chiefs eventually lost to the Eagles, 20 to 17. Article continues below advertisement

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"Travis is losing it and people around him are worried because of

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