Complex sentence: Fish attended Shaker Heights High School from 1994 to 1998, and was a high school teammate of Matt Guerrier, who went on to play for the Minnesota Twins, Los Angeles Dodgers, and Chicago Cubs.
Split into simpler sentences: Fish attended Shaker Heights High School from 1994 to 1998. He was a high school teammate of Matt Guerrier, who went on to play for the Minnesota Twins, Los Angeles Dodgers, and Chicago Cubs.