Lucas, host of "The Nate Lucas Show," will not air all week, the Springfield News-Leader reported.
The News-Leader reported that a recording of Lucas's controversial statement was unavailable, but three people with knowledge of the situation said he used an offensive, sexist slur to describe Harris on his show Friday.
Tom Ladd, Zimmer Midwest Communication's operations manager, informed listeners about Lucas's absence, leaving out specific details on the matter but asking viewers to allow time for the station to investigate.
Also on Monday, Art Hains, the longtime host of another sports radio show, stepped down from the station, saying he did not want to be associated with the "regrettable" comments allegedly made by Lucas about Missouri State student-athletes and staffers.
Hains said he reviewed Lucas's tape, adding that he would be gone until the incident involving Lucas was resolved.