Ku dhameystir weedha soo socota: Ciyaaraha Olombikada ee 2008 ee ka dhacay Beijing, Shiinaha, Peirsol wuxuu ku guuleystay dahabka orodka dhabarka ee 100 mitir iyo
4 x 100 mitir oo isku xigta. Waxa kale oo uu lacag ku guuleystay orodka dhabarka ee 200 mitir. Tartankiisii ugu horreeyay, oo ahaa 100-mitir oo dhabarka ah, Peirsol wuxuu ahaa midka ugu cadcad dahabka, isaga oo ahaa rikoodhka adduunka iyo horyaalkii Olombikada difaacayay. Finalka 100 mitir ee dhabarka, Peirsol wuxuu ku dabaalanayay wadada labaad, isagoo kaalinta shanaad ka galay semi-finalka. 50-kii mitir ee ugu horreeyay ee 100-ka mitir ee dhabarka dambe, Peirsol wuxuu ahaa kaalinta labaad Liam Tancock, oo ku soo baxay 25.11. Peirsol wuxuu 0.54 sekan ka dambeeyay Tancock markii uu rogmaday. Si kastaba ha noqotee, ka dib wareegga, Peirsol wuxuu dhaafay Tancock, oo ugu dambeyntii kaalinta lixaad galay, wuxuuna ku guuleystay dahabka. Waqtigii ugu dambeeyay ee Peirsol ee 52.54 wuxuu ahaa rikoor cusub oo adduunka ah, isagoo hagaajiyay rikoorkiisii hore ee 52.89 ee la dhigay bishii hore. tartanka kadib, Peirsol wuxuu yiri, " xoogaa ayaan ka dareemay xiiso, xoogaa niyad jab, gabi ahaanba waan ka dareemay farxad". Tartankiisii labaad, 200-mitir oo dhabarka ah, Peirsol ayaa kaalinta labaad ka galay Ryan Lochte 1:54.33 ilaa 1:53.94. Markii uu ku guuleystay dahabka, Lochte wuxuu jabiyay rikoodhka adduunka ee isku midka ah isaga iyo Peirsol ee 200-mitir dhabarka. Tartankiisii ugu dambeeyay, 4 × 100 mitir isku-dhafka isku-dhafka ah, Peirsol wuxuu la midoobay Brendan Hansen, Michael Phelps, iyo Jason Lezak si ay ugu guuleystaan dahabka waqtiga rikoodhka adduunka ee 3:29.34, hoos u dhigista calaamadda hore ee 3:30.68 oo la dhigay afar sano ka hor Athens.