GAINESVILLE, FLA. ? Florida basketball coach Billy Donovan finally signed the six-year contract extension he agreed to in June 2007 after deciding against a jump to the NBA. The deal is worth more than $19.5 million before incentives. Donovan, who is 285-115 in 12 seasons, received a salary, before incentives, of $3.1 million last year. He took the head coaching job with the Orlando Magic in June 2007 before returning to Florida after a much-publicized change of heart.