Column: Another sobering reminder of the price players pay

The news seemed unimaginable, much as it might have 78 years ago when Yankees fans learned Lou Gehrig was diagnosed with the disease that would later bear his name. It came on a Sunday night via a more modern form of communication, a Twitter feed. Dwight Clark didn't need the full 140 characters to stun football fans everywhere. "I wanted to share some unfortunate news: I have ALS," Clark tweeted .

NFC Free Agency Capsules

A look at each NFC team's free agency situation (salary cap space is estimated): DALLAS COWBOYS (12-4) UNRESTRICTED FREE AGENTS: CB Brandon Carr, S Barry Church, CB Morris Claiborne, G Ron Leary, QB Kellen Moore, RB Darren McFadden, RB Lance Dunbar, WR Terrance Williams, S J.J.