X-rays negative, MRI coming for Kolb

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After the Arizona Cardinals got a glimmer of John Skelton post-ankle injury (two for 10 with a pick), they likely have renewed appreciation for Kevin Kolb.

But Kolb has a rib injury, the severity of which is unknown.

Coach Ken Whisenhunt said Monday that X-rays of Kolb’s sternum and ribs were negative.  An MRI is pending.

The Cardinals travel to Minnesota on Monday.