This set contains simple games for six sports. They appear to all be modified versions of the six games in RGI's Play the Pros series, published a few years earlier. The games are:
Baseball, presumably based on Major League Baseball Game by Yogi Berra (no BGG entry)
Football, presumably based on Pro Football Game by Paul Warfield (no BGG entry)
Hockey, presumably based on Pro Hockey Game by Rod Gilbert (no BGG entry - this is not the same as Rod Gilbert's Violent World of Pro Hockey)
Basketball, presumably based on Pro Basketball Game by Oscar Robertson (no BGG entry - this is not the same as Oscar Robertson's Pro Basketball Strategy)
Auto Racing, based on Grand Prix Auto Race Game by Jackie Stewart. This version removes the apex lines, changes the car construction system in several ways, adds pit stops, etc.
Tennis, based on Pro Tennis Game by Rod Laver. This version adds shot cards and makes other changes.