- Kenyan Marathoner Titus Ekiru (2:02:57 PB, #6 On The All-Time List) Gets 10-Year Doping Ban Ekiru's ban is 10-years because he was found guilty of two charges of tampering as well as testing positive twice. The AIU investigation revealed he colluded with a Kenyan doctor at a hospital to receive the drugs and then cover-up the tests with forged hospital records.