Following the Kansas City Chiefs' practice session on Monday, wide receiver JuJu Smith-Schuster posted a very interesting tweet.
"Today was the hardest practice of my NFL career! & we’re just getting started," Smith-Schuster tweeted.
Smith-Schuster is entering his first season with the Chiefs. He signed a one-year deal with the franchise that's worth up to $10.75 million.
Prior to joining the Chiefs, Smith-Schuster spent every season of his NFL career with Mike Tomlin and the Pittsburgh Steelers.
Some fans are wondering if this tweet from Smith-Schuster is a shot at the Steelers.
Others believe this is Smith-Schuster's way of applauding Andy Reid for conducting a strict, physical camp.
And of course, there are a few TikTok jokes being made at Smith-Schuster's expense.
Smith-Schuster had 323 receptions for 3,855 yards and 26 touchdowns during a five-year run in Pittsburgh.
Now that he's catching passes from Patrick Mahomes, there's a chance Smith-Schuster can elevate his game.
The Chiefs will kick off the regular season on the road against the Arizona Cardinals.