Pedzisa mutsara unotevera: Silas Kiplagat akakunda Mwangangi paPrisons Cross Country muna 2011, asi akazvigadzirisa nekusimudza zita rekutanga revakuru vevarume pa2011 African Cross Country Championships. Mumwedzi iwoyowo akamhanyira kuLisbon Half Marathon ndokuva mumhanyi wechipiri shure kwaZersenay Tadese, uyo akanga achimhanya panguva iyoyo-yechipiri-yakakurumidza nguva. Akadzivirira zita rake paRabat Half Marathon mwedzi wakatevera. Muchikamu chechipiri chemwaka, akauya wechitatu paDam tot Damloop munguva yakanakisisa yemakiromita gumi yemaminitsi 45: 13. Akakunda kwenguva yechipiri yakatevedzana kuParis 20K akabva apedza basa rimwe chetero kuValencia Half Marathon, kwaakavandudza zvakanakisisa zvake pamusoro pemurefu kusvika 59:45 maminitsi. Muna December akauya wechitatu paMontferland Run. Akanga ari mumhanyi wechipiri kuna Zersenay Tadese paLisbon Half Marathon munaKurume 2012. Akanga ari mumwe wevatambi vepa 2012 Rotterdam Marathon uye vamhanyi vaviri vepamusoro vakapedza pasi pemaawa maviri nemaminitsi mashanu. Pa
2012 World Half Marathon Championships muKavarna, Bulgaria, akahwina menduru yebronze munguva ye1: 01: 01 maawa, uye akabatsira vatambi vake kuhwina zita rechikwata. Kubuda kwake kwokupedzisira panhambo iyoyo gore iroro, kwakamuona achipedza somumhanyi wechipiri muValencia.