He was six months into an early retirement when the competitive juices kicked in.
"All of a sudden, you're going, 'Wait a minute. Wait a minute. What am I doing here?'" he said. "You're faced with a real tough question: What's your life?"
Unlike NFL quarterback Brett Favre, who created quite a stir in these parts with his recent reversal of field, Brian Muldoon has stayed retired since selling his business five years ago at 45. But he was hardly immune to the "I can still play!" pangs that inevitably hit those who leave behind a flourishing career at a relatively early age.
"You face a moment where you think, 'Do I come back?'" said Muldoon, now splitting his time between Minneapolis and northern California. "You have to look at it really hard and have the discipline to say, 'I stepped aside for a reason.' "
The problem for Muldoon and other "stars" who give up competitive jobs is that their identity becomes predominantly wrapped up in their work. What they do is who they are.
As Muldoon put it, "Your life grooved into that thing; you became that job, like a quarterback does."
It's an identity crisis, pure and simple. And more Minnesotans are experiencing it, with a raft of company sales and a trend among baby boomers to step away from the rat race.
State demographer Tom Gillaspy said there's no clear data on Minnesota's early retirements.