Mergia is returning to London as the 2010 champ for the first time as she initially finished 3rd, but has since been upgraded after Liliya Shobukhova and Inga Abitova received doping bans.
Molly Huddle was the top earner with more than $150,000 in prize money this year; Jared Ward was the top man at $105.166. The Americans are a way behind the top international earners as Ethiopians Aselefech Mergia and Lelisa Desisa earned $307,000 and $275,000 respectively.
On a positive note, Geoffrey Mutai was added to the men's field and Dubai Marathon winner Aselefech Mergia (2:19:31 pb) was added to the women's.
The 2:19:31 runner hasn't race a marathon since 2012 as she took time off to have a baby. She'll face a deep field including defending champ Mulu Seboka (2:23:12), Lucy Kabuu (2:19:34), Frankfurt Marathon champ Aberu Kebede and World Half-Marathon champion Gladys Cherono who is making her marathon debut.
Mergia, who set the CR of 2:19:31 in 2012, before taking a maternity break will race as will 2011 NYC champ Firehiwot Dado.