 Nyorai kuenderera mberi kweiyi ndima - Pa2017 World Aquatics Championships, Peaty akachengetedza zita rake remamita zana. Mushure mekukunda zviri nyore kupisa kwake uye nhangemutange dzema semi-fainari, akakunda mumakwikwi ekupedzisira achikunda nhangemutange ine rekodhi yemakwikwi yemasekondi 57.47. Peaty akatyorawo rekodhi yake yepasi pose kaviri mumakwikwi emamita 50 ekumhanya nechipfuva. Akanyora 26.10 masekondi mumakwikwi okutanga, uye mumasemi-fainari, akava munhu wokutanga kuputsa 26 masekondi uye akakunda mumasekondi 25.95. Akabudirira kudzivirira zita rake remamita 50 breaststroke neimwe sub-26 nguva yemasekondi 25.99 mumakwikwi ekupedzisira, achipedzisa imwe kaviri paWorld Championships navan der Burgh vachitora bronze. Akakunda imwe sirivha mumakwikwi e4 × 100 metres medley relaypaWorld Championship, achiisa rekodhi idzva reBritain, aine chimiro chimwe chete cheOlympic cheWalker-Hebborn, Guy naScott, asi akarasikirwa nemenduru mu4 x 100 metres yakavhenganiswa medley relay naDavies, Guy naOConnor kunyangwe achiisa rekodhi nyowani yeEuropean. 