The teeth belonged to Cobb, who played for Tigers from 1905 to 1926 and died in 1961.
"Originally sourced from the collection of Cobb's biographer Al Stump, our consignor acquired them in the famous Barry Halper sale back in 1999 and has owned them ever since," the listing reads. "At one point, Cobb's famous jaws were loaned to the Baseball Hall of Fame where they were displayed in the museum in Cooperstown, N.Y."
The item description says the "one-of-a-kind artifact has been preserved in immaculate condition since Cobb's death."
Cobb still holds the Major League Baseball record for career batting average at .366.
Bidding on the dentures closes Friday night. Bidding had surpassed $14,000 as of Friday afternoon.