According to Plaintiff&apos;s disclosure, Mr. Taft "may testify regarding the EEOC&apos;s damage calculations, including the use of the proprietary software &apos;PayCalc&apos; to arrive at the [] calculations of back pay and interest, and will testify regarding any revisions to the calculations necessary based on trial testimony." (Doc. 319-1 at 6). Plaintiff concedes that Mr. Taft was not disclosed as a potential trial witness until after the close of discovery. (Doc. 342 at 5). Under Rule 37, Mr. Taft&apos;s testimony should be excluded unless the Court deems the late disclosure of his testimony to be substantially justified or harmless.