Complex sentence: His career at KOMO has seen him cover nearly every major sports event in Seattle, and in some cases abroad where he'll frequently be seen reporting live on location where the Mariners, Sonics, or Seahawks are playing.
Split into simpler sentences: His career at KOMO has seen him cover nearly every major sports event in Seattle, and in some cases abroad. He can frequently be seen reporting live on location wherever the Mariners, Sonics, or Seahawks are playing.