Michael Jordan's "big" brother is James R. Jordan (named, at least in part, for their dad, James Jordan). JRJ is seeking to continue his enlistment in the Army PAST HIS MANDATORY RETIREMENT after 30 years' service. Big brother is a misnomer b/c JRJ is 5'7" and Michael is around 6'6". But the inner drive and athletic ability seem to be a common genetic trait among these sons of the late James Jordan. Click the link in the title for a nice profile of MJ's older brother.
HT: Powerline Blog.