Hello,
Further investigation seems to be that in order for Record Series to appear, the programming must be episodic in nature (as part of a TV series.) Sports games are not considered part of a series, therefore, no option for series recordings for sports content exists for specific games and teams.
Note that having this option would be hard for customers with older boxes and much smaller DVR hard drives. They would fill up too quickly. A DVR was never intended to be a long term storage device. Users at this time must record specific sports team games individually.
Satch