We report a case of olecranon bursitis due to Mycobacterium goodii in a 60-year-old man. Prior to recognition of his infection, he received intrabursal steroids and underwent olecranon bursectomy. His infection was cured with antimicrobial therapy consisting of doxycycline and ciprofloxacin. This case illustrates that previously unrecognized members of the Mycobacterium smegmatis group of mycobacteria have pathogenic potential.