Jim Ryun-good career with a Olympic silver
Tim Danielson-Never broke 4 after high school and killed his wife
Marty Liquori-Only made one olympics and was plagued with many injuries but ran some good times and had some NCAA champs
Alan Webb-made a couple world finals and won 3 international races. Most would say a disappointing career.
Lukas Verzbicas-got in a cycling accident and no longer competes
Matthew Maton-extremely burned out
Grant Fisher-doing amazing
Drew Hunter- has really not done much since going pro
Michael Slagowski-extremely burned out
Reed Brown-TFFRS has him listed as running 3:38.76, 3:56.61. Ran 3:59.3 almost 4 years ago now. Not exactly a good progression
Hobbs Kessler/Leo Daschbach- Remains to be seen.
Out of all of those guys, only Ryun had a career that lived up to the expectations career. Looks like Fisher is going to be good, and I guess an argument could be made for Webb or Liquori, but I would say no.