oh this is nice, doing a little reading on lilesa....i know most of this simple stuff is still way over your head but lets just try shall we?
https://en.wikipedia.org/wiki/Feyisa_Lilesa
from reading you will see building up to his debut of the marathon his PR's were
28:20 10k
1:02:15 half
and went on to run 2:09:12
but yeah i am soooo confused and i dont know what im talking about...to bad this again CONFIRMS my reasoning.
his next marathon, 2:08:47
then the next, 2:05:23, dragged to 4th place and i will guess rotterdam is like dubai, courses that cause outliers
next marathon chicago, 2:08:10
next, world champs 3rd place 2:10:32
then a half in 59:22
then another one 2 min slower
then fell off the map missed making the olympics, then goes on to crush out a 2:04:52, EPO anyone?
then 2:06:56
then rio, 2:09:54
no juice and he runs between 2:08-2:09
and here are his yearly SB at 10k
2013 28:12 Ras Al Khaimah 15 FEB
2012 28:03 Houston, TX 15 JAN
2010 28:06 New Delhi 21 NOV
2009 28:20 New Orleans, LA 11 APR
but you are right, having 28 low 10k best doesnt have anything to do with running 2:08-09...well we will just have to see what gaaaaylen flup runs now wont we