Complex sentence: He was the first player in major league history to lead the league in hits three consecutive years, since accomplished by only five others; he led the NL in hits a fourth time with the 1907 Braves.
Split into simpler sentences: He was the first player in major league history to lead the league in hits three consecutive years. Sine then it has only been accomplished by only five others; he led the NL in hits a fourth time with the 1907 Braves.