"We respect the significance of this day," the company said in its apology.
The sports betting giant is just the latest company to fail to properly commemorate the terrorist attacks.
The site briefly offered bettors a parlay, a wager tied to multiple outcomes, based on three New York teams playing Monday night.
"We sincerely apologize for the featured parlay that was shared briefly in commemoration of 9/11," the company said in a statement posted on Twitter.
"We respect the significance of this day for our country and especially for the families of those who were directly affected."
Persons:
DraftKings, bettors, Aaron Rodgers, Papa John's
Organizations:
Service, New York, League Baseball's New York Yankees, Mets, New York Jets, Buffalo Bills, Twitter, Washington Post, Florida Walmart, Bear, Los Angeles Times, Bank of America
Locations:
Wall, Silicon, Ohio, Washington, Florida, DraftKings