Complex sentence: First-class cricket resumed in the 1945--46 season, and Brown resumed his career with a steady season, scoring 604 runs at 46.46 with five half-centuries, which placed him second only to Sid Barnes in the run-scoring aggregates.
Split into simpler sentences: First-class cricket resumed in 1945--46, and Brown began the post-war phase of his career with a steady season, scoring 604 runs at 46.46 with five half-centuries. This placed him second to Sid Barnes in the run-scoring aggregates.