The Kansas City Chiefs looked like they had a Super Bowl hangover in the first quarter of their season opener against the Los Angeles Chargers on Friday night.

After allowing the Chargers to go up 10-0 in the second quarter, the Chiefs started to wake up, but they failed to overtake their AFC West rival in a 27-21 loss i n front of 47,627 fans at Corinthians Arena in Sao Paulo, Brazil.

Following the game, quarterback Patrick Mahomes had a warning for the Chiefs, saying they needed to play with better energy if they wanted to win games this season.

“They came out with more energy than we did, their defense than our offense,” Mahomes said, via Michael David Smith of Pro Football Talk. "I thought we had energy at practice yesterday and all throughout the week, but if you don’t come

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