The 48-year-old former first baseman with the Diamondbacks and the Chicago Cubs pleaded guilty Thursday to felony endangerment and misdemeanor driving under the influence of alcohol.
Grace was arrested last August in Scottsdale -- his second drunken driving arrest in 15 months -- and could have faced more than three years in prison. He had pleaded not guilty in October to four felony counts of aggravated DUI and was scheduled to go on trial March 19.
The Diamondbacks fired him as their analyst after the August arrest but later invited him to participate in a fantasy camp.
A Maricopa County Superior Court spokesman says the jail sentence begins Feb. 10. Grace must also serve two years of probation.