Turner was arrested on charges of drunken driving and speeding on Sept. 18, just hours after he scored a touchdown in a victory over the Denver Broncos.
FoxSports South, citing the Gwinnett County solicitor's office, reported that Turner pleaded guilty to a charge of reckless driving, a lesser charge, on Feb. 28. He was sentenced to 12 months of probation, fined $1,000 and ordered to complete 30 days of community service. Turner also paid a $250 fine after pleading guilty to the speeding charge.
Turner, 31, was released by the Falcons on March 1. The Falcons ultimately replaced him by signing veteran running back Steven Jackson.
Turner remains unsigned since his release.
A Gwinnett County police officer pulled over Turner's black Audi R8 on Interstate 85 northeast of Atlanta on Sept. 18 after clocking the car at 97 mph -- 32 mph over the speed limit. Turner was arrested after a field sobriety test.
Turner was the first big free-agent signing under the Thomas Dimitroff-Mike Smith regime in 2008. The bruising back rushed for 1,699 yards his first season and more than 1,300 yards two other years. But his playing time dipped dramatically in 2012 as the Falcons gave more carries to a totally different kind of back, Jacquizz Rodgers, who provided more speed and quickness.
Turner rushed for 800 yards last season, the lowest of his five-year Atlanta stint, with 10 touchdowns. He averaged a career-low 3.6 yards per carry.
Information from The Associated Press was used in this report.