Kaeser akakwanisa kupinda mumakwikwi evarume emamita mazana maviri ekubhururuka pachipfuva pamitambo yeOlympic yegore ra2012 muLondon, nekutyora rekodhi reSwitzerland rekodhi refu uye kufukidza FINA B-cut ye12: 09 kubva kuEuropean Championships
muDebrecen, Hungary. Akadenha vamwe vanoshambira vanomwe pakupisa kwechina, kusanganisira vaida menduru yepamusoro Clark Burckle weUnited States naRyo Tateishi weJapan. Kaeser akapedzisa munda kunzvimbo yekupedzisira neanopfuura wechipiri kumashure kweHungary Ákos Molnár muna 2:13.49. Kaeser akakundikana kuenda kumasemifinal, sezvo akaisa makumi maviri nemana pakupedzisira mukutanga kwekutanga.