Klay celebrates brother Trayce's first home run with Cubs

Trayce Thompson

Klay Thompson has supported both the Giants and Athletics as a member of the Warriors. Neither are his favorite baseball team, though. 

At least not right now. 

The team Thompson always will root hardest for is whichever team his brother, Trayce, is playing for. Currently, that's the Chicago Cubs. And the Warriors star was pumped Sunday as Trayce hit his first home run in a Cubs uniform. 

Trayce made his Cubs debut on Sept. 14, and earned his first start on Sunday. He went 1-for-3 with the solo shot, a walk and a strikeout and stole a base in Chicago's 6-4 win against the Milwaukee Brewers. The younger Thompson brother now has three walks and two stolen bases as a Cub. 

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The Cubs are the fourth franchise he has played for in the big leagues. He made his MLB debut at 24 years old in 2015 as a member of the Chicago White Sox. That was his first of two stints with the White Sox, and also has played for the A's and Los Angeles Dodgers.

Over 207 major league games, Trayce now has hit 23 homers and has a .206 career batting average.

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