Watt posted the photo on Twitter Sunday night with the caption "Soon."
Several Texans fans joked about the photo saying it looked very similar to the Hulk.
"No joke. I thought that was the hulk for a second there," Twitter user @LonnieMac06 wrote.
Even Cowboys fans chimed in on the tweet.
"I'm a Cowboys fans, but wow," Twitter user @GarDolphin733 wrote.
SEE ALSO: History of JJ Watt's bigger injuries during his career
Just a few weeks ago, Watt showed off his muscles for the troops after Arnold Schwarzenegger challenged him to the #Flex4Forces challenge on social media.
The defensive end played only eight games in the past two years. Last year, he suffered a season-ending injury in his left leg.
The Texans report to training camp Wednesday at the Greenbriar in West Virginia.
Practice starts Thursday.
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