Here's a look at the sponsors of American swimmer Michael Phelps, according to his agents. They declined to specify the value of the deals.下面就是MP经济公司给的他的所有赞助商了，不过拒绝透露签约费咯1.Speedo USA - maker of swimsuits, a licensed brand of the Warnaco Group Inc.2.Visa Inc. - the credit card company3.Omega - luxury watchmaker that is a unit of Swatch Group AG4.Hilton Hotels Corp. - hotel chain5.PowerBar - nutrition bar made by Swiss chocolate maker Nestle SA.6.AT&T Inc. - communications provider7.Kellogg Co. - maker of Frosted Flakes, Cheez-Its and Eggo waffles8.Rosetta Stone Ltd. - language learning software maker9.PureSport - sports performance beverage, made by Human Performance Labs10.SwimRoom.com - Internet site for swimmers11.Source: Sports and entertainment marketing company Octagon.