Complex sentence: Landis was given full power to act in the sport's best interest, although some of his decisions in the Black Sox matter remain controversial: advocates of Black Sox "Shoeless Joe" Jackson and Buck Weaver contend that he was overly harsh with them.
Split into simpler sentences: Landis was given full power to act in the sport's best interest. His decisions in the Black Sox matter remain controversial: advocates of Black Sox "Shoeless Joe" Jackson and Buck Weaver contend that he was overly harsh with them.