 McClatchey akamirira Scotland muBritish Commonwealth Games muna 1974 muAuckland, New Zealand. Muna 1975 akashambira kuScotland pamakwikwi emarudzi matatu muPrague, Czechoslovakia uye pamakwikwi ekushambira emarudzi masere muMallorca, Spain. Akakunda menduru yesirivheri pa 1975 World Championships muCali, Colombia sechikamu cheBritish 4 × 200 m freestyle relay naGordon Downie, Brian Brinkley naGary Jameson Muna 1976, kunze kwekuhwina menduru yebronze kumaOlympics, akaputsa marekodhi eBritish e400 m freestyle, 200 m butterfly uye 400 m munhu mumwe nemumwe, wekupedzisira achishambira kuGreat Britain kuEuropa Cup kuItaly. Akashambirawo kuBritain muEuropean Aquatics Championships muna 1977 muJönköping, Sweden, akakunda makwikwi manomwe eScotland neBritain gore iroro uye akamiririra Scotland pamutambo wenyika sere wegore negore. Akamirira Scotland pa1978 Commonwealth Games muEdmonton, Alberta, Canada uye pamutambo wenyika ina muNetherlands gore rimwe chetero. McClatchey zvakare akamiririra Scotland pamakwikwi emarudzi masere muna 1979, akaputsa rekodhi yeScotland yemamirimita zana bhatafurayi uye akashambira mu1979 Summer UniversiadeWorld University Games muMexico. Muna 1980 McClatchey akahwina muScotland mumutambo wenyika masere paRoyal Commonwealth Pool muEdinburgh kekupedzisira uye zvakare akamiririra Scotland mumutambo wepasi rose muBremen, Germany. 