We report the detection of a candidate brown dwarf orbiting the metal-rich K dwarf HD 91669 , based on radial-velocity data from the McDonald Observatory Planet Search . HD 91669b is a substellar object in an eccentric orbit ( e =0.45 ) at a separation of 1.2 AU . The minimum mass of 30.6 M _ { Jup } places this object firmly within the brown dwarf desert for inclinations i \raisebox { -2.58 pt } { $ \stackrel { \raisebox { -0.86 pt } { $ \textstyle > $ } } { \sim } $ } 23 ^ { o } . This is the second rare close-in brown dwarf candidate discovered by the McDonald planet search program .