Complex sentence: He captained the side in 1957--58 when the club won the Scottish league title, braking the senior British league goalscoring record with 132 goals for, with only 29 conceded.
Split into simpler sentences: He captained the side in 1957--58 when the club won the Scottish league title. The team broke a British league goalscoring record, with 132 goals for and only 29 conceded.