Ryan Jones and Mark McGwire were both American former professional baseball players, which one led the major leagues in home runs?
Ryan Jones (baseball):  Once considered a potential 30 home run hitter at the major league level, he peaked briefly at Triple-A but never reached the big leagues. Ryan Jones (baseball):  He had been compared to Mark McGwire. Mark McGwire:  Each season from 1996 to 1999, he again led the major leagues in home runs.
Mark McGwire