At the 2000 Summer Olympics in Sydney, Folker competed in two swimming events with only six days in between. First, he teamed up with Roland Mark Schoeman, Brendon Dedekind, and deaf-mute Terence Parkin in the 4 × 100 m freestyle relay. Swimming the third leg in heat two, Folker overhauled a 50-second barrier and recorded a split of 49.57, but the South Africans missed the top 8 final by 1.09 seconds, finishing in fifth place and eleventh overall with an African standard of 3:21.28. Because of his powerful effort in the freestyle relay, Folker was selected to join with Simon Thirsk, Brett Petersen, and Theo Verster in the 4 × 100 m medley relay six days later. During the prelims race, he swam a freestyle leg in the same heat with a scintillating anchor of 49.53 to deliver a fourth-place finish and thirteenth overall for the South Africans in 3:42.44.