First Allied CEO Malcolm Glazer's takeover of esteemed football squad Manchester United was just the latest marriage between sports and retail. SimonGroup's owners have the NBA's Indiana Pacers. Garden Commercial Properties' Zygmunt Wilf is in the process of buying the NFL's Minnesota Vikings. From his owner's box, he'll be able to look across the field and see Glazer, who also owns the NFL's Tampa Bay Buccaneers as well as the NHL's Tampa Bay Lightning. On the flip side, former athletes like Roger Staubach and Magic Johnson have made their mark in real estate. The next name to look out for: NFL's all-time leading rusher Emmitt Smith is starting to buy commercial properites, with Staubach's backing.