Webster was sentenced to 12 years in prison in 2012 after he was convicted on four counts of unlawful sexual contact with a minor.
Webster began having sexual contact with the victim, the daughter of a former Bengals coach, when she was 15 and said he was charged only for incidents that took place when she was 15 between September and December 2009. In Ohio, 16 is the legal age of consent.
The Ohio 1st District Court of Appeals in Cincinnati ruled Wednesday that one of the charges should be dropped because it couldn't be proved Webster had sex with the teen during December 2009.
"The state did not present evidence of sexual contact between (the victim) and Webster during December 2009, and (the victim) testified that she thought that Webster had left town in December 2009," the appeals court ruling said.
Webster's sentenced was reduced to 10 years, but the $40,000 fine and $3,400 in restitution to the girl remained the same, the Cincinnati Enquirer reported Wednesday.