A teammate of cornerback Keenan Lewis's at Oregon State, Butler was a fourth round pick in 2009, and has performed fairly well in his time with Dallas.
In an offseason that's seen the Steelers lose a third round pick from the 2009 draft (Mike Wallace) and their first round pick in 2008 (Rashard Mendenhall), they may be in position to take a young player off another team.
La Canfora said "several teams" will be interested in Butler, who had three sacks and a forced fumble, appearing in all 16 of Dallas's games last season. Interest from other teams is intriguing, and while the Steelers have been fleeced out of a few of their new fourth-year free agents (with Keenan Lewis, a college teammate of Butler's at Oregon State), it's tantalizing to think about signing someone else's.
Butler saw limited duty with the Cowboys, considering the talent they have at outside linebacker. He provided decent pressure when he was in there, but there are some concerns about the level of run support he's able to provide.
The Steelers had Dan Connor in for a visit recently, but no contract materialized out of it. Butler would be the second, and would be in position to compete for a starting position with Jason Worilds, and fill in for LaMarr Woodley when he pulls a hamstring.