What is the fine-grained topic of the following text: The Sox, who have significant young pitching depth at the major-league level with Lucas Giolito, Reynaldo Lopez, Carson Fulmer and Carlos Rodon — in addition to a highly regarded stockpile of minor-league prospects that includes Michael Kopech, Alec Hansen, Dane Dunning and Dylan Cease — are entering an important stage of player development in the second year of their rebuild. Only return the topic.
The development and prospects of young pitchers in the Sox baseball team.