McGrady acknowledged the attack
Fred Chamberlin, 57, was working at McGrady's home in southwest Orange County on Aug. 24 when the dog attacked him.
The lawsuit, asking for unspecified damages, was filed Wednesday in Orange County Circuit Court.
"What we want is for a jury to decide what's fair, as far as paying Fred for what has had to come out of pocket, both in the past and in the future," Chamberlin's attorney, Eric Faddis, said Thursday. "He's definitely going to need more plastic surgery, and we've got to be sure he has the resources to pay."
McGrady employed Chamberlin as a home maintenance engineer at his 18,000-square-foot mansion. The two-time scoring champion played for Orlando for four years before being traded to the Rockets last summer.
McGrady, in Orlando on Thursday to play his former team, acknowledged his dog attacked Chamberlin and nearly bit his nose off.
"I feel terrible," McGrady said. "I didn't think he had it in him."
McGrady said his pet is a "very vicious dog," but that he is usually nice. He did not have the dog euthanized after the attack.
According to Faddis, Chamberlin was attacked on the second floor of the mansion after climbing a flight of stairs. When Max jumped him, Chamberlin fell backward down the 11 stairs.
"The dog was trained to attack on command, and Fred has no idea why it chose to attack him," Faddis said.
Jefferson, the Nets' leading scorer and rebounder before he was hurt in a game Dec. 27, will be in a cast for at least two months and then will need another two months of rehabilitation.
Jefferson, who signed a contract extension in August, averaging 22.2 points and 7.3 rebounds through 33 games this season.
The Nets also announced that they signed guard Billy Thomas to a 10-day contract on Thursday. Thomas appeared in seven games with the Washington Wizards, averaging 4.1 points this season.
Six-foot-4 Thomas graduated from Kansas in 1998 and has since played in the NBDL, CBA, IBL, USBL and in Europe.
Knight, who ranks second in the NBA with 9.3 assists a game, was injured in the first quarter of Wednesday night's 107-105 loss to Philadelphia. He is also doubtful for Sunday's game against Toronto.
Jason Hart replaced Knight on Wednesday and scored a team-high 19 points, but missed a potential game-tying layup at the end of regulation.
Hart will start Friday against the Mavericks. The Bobcats have lost six straight and 12 of their past 13 games.
Thomas has been filling in for Mark Madsen, sidelined with a broken left thumb for at least another four to five weeks. Thomas, a standout on the University of Minnesota team that went to the Final Four in 1997, averaged 1.5 points, 2.0 rebounds and 11.0 minutes over the last six games since signing his first 10-day deal.
Thomas was the Timberwolves' final cut in training camp and played for Sioux Falls in the CBA until returning to the NBA. He was originally drafted in the first round in 1997 by New York with the 25th overall selection.
Information from The Associated Press and SportsTicker was used in this report.