Complex sentence: But, reflecting the unpredictability of this fierce rivalry dating back over 50 years, Lee upset Lanier, and after one play-off win the Poets were eventually eliminated by Daphne.
Split into simpler sentences: But, reflecting the unpredictability of this fierce rivalry dating back over 50 years, Lee upset Lanier. The Poets still made the playoffs, but the Poets were eventually eliminated by Daphne.