The famed former ballplayer, who played four seasons with the D-Backs starting in 2000, was arrested at about 1 a.m. on June 2 by Scottsdale police for driving under the influence.
"If someone says [they had] two drinks it's really more scientific than saying the number of drinks and the BAC matches up," Sergeant Mark Clark, spokesman for the Scottsdale Police Department tells New Times. "It depends on how your body deals with the alcohol. But he was over the legal limit and we treat it as such."
Police noticed 46-year-old Grace's 2009 Jaguar swerving within its lane near North 71st Place and East Shea Boulevard and pulled over the drunken ex-ballplayer.
Grace, who had bloodshot eyes, admitted to having "a few drinks," according to the police report. He didn't have his wallet or license on him and fumbled through the field-sobriety tests.
Cops cuffed him after a field test and took him to a nearby command post for a blood sample and booking.
When asked by the arresting officer how he thought he did on his sobriety test, the report states that Grace replied, with the smell of alcohol on his breath, "Not well enough."