It's not known who are being sent down, but Eric Patterson and Sean Gallagher seem to be in danger.
It's about time that Pignatiello was given a chance after all of the success he's had as a minor league reliever.
Fox was up last month and received two at-bats in eight days.
Fox, who is making his second stint with the Cubs, hit three home runs in a game last week.
He's hitting .328 at Iowa with five homers and 13 RBIs and has 23 homers overall with Iowa and Double-A Tennessee.
No word yet on any impending roster moves.
And since left-hander Will Ohman is currently doing damage control in Iowa and fellow lefty Scott Eyre remains generally out-of-view in pressure situations, Pignatiello may have an opportunity to become the Cubs' primary late-inning left-hander.
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