What is the fine-grained topic of the following text: Bol Bol has plenty of question marks surrounding how his game and size will translate to the NBA level, but at 7-foot-2 and with a 7-foot-8 wingspan and 9-foot-7 standing reach, he can be a dominant NBA player if he continues to develop and get stronger. Only return the topic.
Bol Bol's potential as an NBA player