I dont think you can make a full career within ten years of having a contract but here are some examples of guys who have had successful careers post distance running. If you added sprinters the list would be much longer
1) Sebastian Coe - Politics
2) Steve Cram - TV Presenter
3) Brendan Foster - TV Presenter
4) Haile Gebreselassie - Enterpreneur
5) Sydney Maree - Politics
6) Jos Hermans - Agent
7) John McDonnel - Coach
8) Steve Scott - Coaching
9) Jim Ryun - Politics
10) Eamon Coglan - Televisions and Charity Work
11) Rudy Chapa - global director of sports marketing at Nike now an enterpreneur
12) David Moorcraft - Chief Executive of UK Athletics until 2007 / Broadcasting
13) Filbert Bayi - Social upliftment
14) Suzy Favor Hamilton - Motivational Speaking and running camps
15) Craig Masback - CEO US Track and Field and director of business affairs for Nike
16) Joe Falcon - Police Officer
17) Jim Spivey - Motivational speaking and coaching
18) Marti Liquori - Running shoe stores - at the peak there were 250 stores has also written books and done other commerical work
19) Marla Runyan - Motivational Speaking
20) Herb Elliot - CEO of Puma from 2001 to 2006
21) Alberto Salazar - Coaching (Nike program)
22) Kip Keino - Chairman of kenyan Olympic Committe and Does charity work
23) Peter Elliot - Works for UK sports institute
24) Said Aquita - Technical consultant for various sporting bodies and now works for Aljezeera TV station
I am sure some other can add some more information but thats a good start..