Yes, one constant with all the loser Senate candidates - COD, McMahon, Fiorina - they never held elective office... and Ken Buck held only a minor office.
The winners - Toomey, Rubio, Kirk, Portman,etc. - all held office before.
Given that, we were more likely to win with Simmons in CT, Mike Castle in DE, and ... Chuck Devore in CA. (!)
Interesting point- definitely is a strong correlation there. (Although Angle held office before and lost).
Rand Paul is an exception.