Complex sentence: Baker had been the busier of the two boxers in the four months between their meetings, contesting six matches to Powell's single fight against Edmunds; though Baker's last two bouts had seen him face defeat for the first time in his career.
Split into simpler sentences: Baker had been the busier of the two boxers in the four months between their meetings, contesting six matches to Powell's single fight against Edmunds. Although Baker's last two bouts had seen him face defeat for the first time in his career.