===Kejuaraan===
[[File:Floyd Patterson 1957.jpg|thumb|left|upright|Patterson in 1957]]
Meskipun Patterson bertanding dengan bobot tubuh di sekitar batas maksimal kelas berat ringan dalam sebagian besar pertandingan awalnya, dia dan manajernya, Cus D'Amato, selalu punya rencana bertanding dalam perebutan gelar juara kelas berat. InPada factkenyataannya, D'Amato madedengan thesejelas plansmengungkapkan clearrencana asitu earlypada astahun 1954, whenketika hedia toldberkata thekepada pressmedia thatbahwa Patterson wasmenginginkan aiminggelar forkelas the heavyweight titleberat.<ref>{{cite book |editor-last=Weston |editor-first=Stanley |title=The Best of the Ring |url=https://archive.org/details/bestofringbibleo0000unse |publisher=Bonus Books |year=1996 |location=Chicago |page=[https://archive.org/details/bestofringbibleo0000unse/page/183 183] |isbn=1-56625-056-0}}</ref> HoweverNamun, aftersetelah [[Rocky Marciano]] announcedmengumumkan hispensiunnya retirementsebagai asJuara WorldDunia HeavyweightTinju ChampionKelas onBerat AprilWorld pada tanggal 27, April 1956, Patterson wasmendapatkan rankedstatus bypenantang teratas di kelas berat ringan oleh majalah [[The Ring (magazine)|The ''Ring'' magazine]]. asSetelah the top light heavyweight contender. Afterpensiunnya Marciano's announcementdiumumkan, Jim Norris of thedari [[International Boxing Club]] statedmenyatakan thatbahwa Patterson wasadalah onesalah ofsatu thedari sixenam fighterspetinju whoyang wouldakan takeambil partbagian indalam anturnamen eliminationeliminasi tournamentuntuk tomenentukan crownpenerus Marciano'sgelar successorMarciano. ''The Ring'' thenkemudian movedmenempatkan Patterson intosebagai thenomor heavyweightlima rankings,dalam atpemeringkatan numberdi fivekelas berat.<ref>{{Cite journal |last=Daniel |first=Dan |title="I Won't Be Back," Says Marciano |journal=The Ring |volume=84 |issue=8 |pages=90–91 |date=August 2005}}</ref>
====Patterson vs. Moore====
AfterSetelah beatingmengalahkan [[Tommy Hurricane Jackson|Tommy "Hurricane" Jackson]] indalam anpertandingan elimination fighteliminasi, Patterson facedmenghadapi LightJuara HeavyweightKelas ChampionBerat Ringan, [[Archie Moore]], onpada Novembertanggal 30, November 1956, fordalam thepertandingan Worldperebutan Heavyweightgelar Championship.Juara HeDunia beatKelas MooreBerat. byDia amembuat [[knockout]]Moore inKO fivepada roundsronde andkelima becamedan themenjadi youngestJuara WorldDunia HeavyweightKelas ChampionBerat intermuda history,dalam atsejarah. theKala ageitu ofdia berusaia 21 yearstahun, 10 monthsbulan, 3 weeksminggu, anddan 5 dayshari. HeDia adalah pemegang wasmedali theemas firstOlimpiade Olympicpertama goldyang medalistmemenangkan togelar winjuara atinju professionalprofesional heavyweightkelas titleberat.
[[File:Ingemar Johansson and Floyd Pattersson 1959.JPG|right|thumb|[[Ingemar Johansson]] knocks out Floyd Patterson and becomes boxing heavyweight champion of the world, June 26, 1959.]]
====Patterson vs. Johansson I, II, & III====
After a series of defenses against fringe contenders (Hurricane Jackson, [[Pete Rademacher]], Roy Harris,<ref name=tloftphrs>{{cite news |url=https://news.google.com/newspapers?id=oSZYAAAAIBAJ&sjid=FPcDAAAAIBAJ&pg=5771%2C3592396 |newspaper=Spokane Daily Chronicle |location=Washington |agency=Associated Press |title=Tale of the tape |date=August 18, 1958 |page=15}}</ref> and [[Brian London]]), Patterson met [[Ingemar Johansson]] of Sweden, the number one contender, in the first of three fights. Johansson triumphed over Patterson on June 26, 1959, with the referee [[Ruby Goldstein]] stopping the fight in the third round after the Swede had knocked Patterson down seven times. Johansson became Sweden's first World Heavyweight Champion, thus becoming a national hero as the first European to defeat an American for the title since 1933.
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