They helped players serve up sweet treats at the Oakland Coliseum.
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Proceeds go to the team's community fund.
Sugar-free root beer and ice cream will be available.
Root Beer Float Day has raised more than $486,000 since it started in 2003.
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ABC7 News Meteorologist Mike Nicco and Weather Anchor Spencer Christian attended the fundraiser and lent a helping hand.
Click here if you'd like to make a donation to the Oakand A's Community Fund and click here to read more stories about the Oakland Athletics.