Here is the statement from Marc Andreessen on the speculation that he was in the running to take over the operating role of Yahoo.

From Marc Andreessen, co-founder and general partner of Andreessen Horowitz:

Over the last several weeks, there have been erroneous reports in the press that my partner Jeff Jordan and/or I might become an operating executive of Yahoo in some capacity.

To be crystal clear, neither Jeff, nor I, nor any of our partners at Andreessen Horowitz, are in the running for, or would accept, any operating role at Yahoo, including CEO, acting CEO, chairman, or executive chairman.

Jeff and I have high regard for Yahoo, but we are fully committed to our day jobs as general partners at Andreessen Horowitz and board members of our portfolio companies.

I was vocal on Marc being a good candidate (which he is). On the other more realistic hand is that he has a lot on his plate like running the fastest growing leading venture capital firm in the valley. That is a $2 billion dollar fund.