Action News was told the gathering was for Derek's second son, Deker's birthday party.
The guest list included NFL star receiver and newly named Oakland Raider, Antonio Brown, as well as brother Darren Carr, who is Head Coach at Bakersfield Christian High School.
The crew had some laughs over a little friendly competition on a series of inflatable obstacle courses.
Darren shared a video with Action News on Twitter showing him race head-to-head with Antonio, while Derek acted as the referee.
Derek Carr later teased on his Instagram when he and David will get statues made up at Bulldog Stadium.
FULL VIDEO: Derek Carr returns to Fresno with big-name guest list for his son's birthday