Jerry gave the OK though:
“I talked to [team chairman] Jerry [Reinsdorf] and said `we’re either in it to win it or we’re not,’ ‘’ Williams said. “There was a little trepidation on the finances [on Reinsdorf's part],” but Reinsdorf again okayed the move Williams had hoped to complete months earlier. … With Peavy comes more than $42 million in contract obligations remainined on the $52 million extension he signed before the 2008 season. Peavy is being paid $11 million this year, $15 million next season, $16 million in 2011 and $17 million in 2012. The contract has a club option for 2013 of $22 million or $4 million buyout for Peavy.
UPDATE: ESPN has more:
Chicago White Sox chairman Jerry Reinsdorf said Friday he was initially opposed to the trade that sent former Cy Young winner Jake Peavy to Chicago. Reindorf said White Sox GM Williams sent him an e-mail to ask him if he wanted Peavy. Reinsdorf said no but he was willing to talk. “He and Rick [Hahn, assistant general manager] came in and talked me into it,” Reinsdorf told Chicago’s Baseball Tonight on ESPNChicago radio. “That’s how it went down.” …