Helton entered his plea and apologized Tuesday in a courtroom in Brighton outside of Denver.
He had been charged with driving under the influence and careless driving after his Feb. 6 arrest, but prosecutors dropped those charges under a plea deal with the five-time All Star.
Police say Helton told officers he had had two cups of wine.
Helton is a career .320 hitter and a three-time winner of the Gold Glove. He has spent his entire career with the Rockies and is one of the most popular and recognizable players on the team.
Helton's hitting .267 this season.
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