Pedzisa mutsara unotevera: Pashure pokunyorwa muuto, achishumira somunhu anoramba nokuda kwehana, Tuttle akapfuurira kumhanya. Panguva iyi ndipo paakaedza kumhanya marathon kekutanga, achipedza ari wechipiri mumakwikwi okutanga uye achikunda wechipiri. Muna 1975 akanga ari wechina mukurumbira mumarathoni muUnited States uye akanga achizviona somumhanyi wemarathoni. Akakunda National Championships muMarathon muna 1975 na1976 Munhu mumwe chete kubvira Tuttle akabudirira kudzokorora seNational Champion Akanga ariwo wekutanga National Champion pamakiromita gumi nemashanu uye akakundawo National Championship pamakiromita makumi maviri nemashanu. Akaguma ari wechinomwe pamakwikwi ose
1976 IAAF World Cross Country Championships.