There's no hard-and-fast evidence that any company has actually pulled ads, but a Gillette spot featuring Woods aired eight times in November and for the last time Nov. 29, two days after the scandal broke, according to Nielsen.
The data only measures which ads were aired on 23 major channels during certain prime time, late night and weekend slots.
Woods' image as a family man has been tarnished by reports of his apparent extramarital affairs. The stories began Nov. 27, when Woods drove into a fire hydrant outside his home in Windermere, Fla., possibly after an argument with his wife, Elin Nordegren.
Retailers wonder if fans of Woods are now thinking twice about buying his autographs and branded golf shirts.
"People are nervous about paying $1,000 for his signatures because their value might go down," said Mike Gallucci, vice president of operations at SportMemorabilia.com, a large vendor of sporting souvenirs.
He said sales of Woods photos, pin flags and clubs have dropped by almost half.
"Around Christmas, you get a lot of parents buying for their kids and if they don't view the athlete as a role model, their purchases go down," he said.
Woods' legendary golf skills propelled him to the top of many corporations' wish lists as a star endorser. He has earned more than $100 million annually and, according to Forbes magazine, more than $1 billion in his career thus far, thanks partly to his endorsement deals.
Other athletes such as Kobe Bryant, who was accused of rape in 2003, have sometimes taken years to repair their images.
The case was dropped but not before he admitted an adulterous sexual encounter with his accuser.
Bryant lost an endorsement deal with McDonald's in 2004 after the fast food maker refused to renew his contract.
ABC News' Daniel Arnall and Alice Gomstyn contributed to this report.