Complex sentence: When Louis Williams returned from injury, Holiday lost his starting job for a few games, but since the Sixers kept losing, Holiday regained the starting job, and kept it for the rest of the season.
Split into simpler sentences: When Louis Williams returned from injury, Holiday lost his starting job for a few games. However, since the Sixers lost several games after this change, Holiday regained the starting job and kept it for the rest of the season.