Fred J. Mann (April 1, 1858 – April 6, 1916) was an American center fielder in Major League Baseball for six seasons, and played for five different teams. He was born in Sutton, Vermont and debuted with the Worcester Ruby Legs in 1882. In 1884, Mann's seven home runs was tied for fourth in the American Association. After his baseball career was over, Mann ran a hotel in Springfield, Massachusetts. He died of prostate cancer and is interred at Oak Grove Cemetery in Springfield.