Doug Petno and Troy Rohrbaugh are the frontrunners to succeed Jamie Dimon. Here's a guide to the men in line for one of Wall Street's top jobs.

The moves would appear to make Doug Petno and Troy Rohrbaugh the most obvious possible successors to JPMorgan Chase CEO Jamie Dimon.

Dimon, who turned 70 in March, has been JPMorgan's boss for two decades, steering it through the financial crisis.