Frank Grillo, who appeared earlier this year in The Grey, is rumored to be up for a part in Marvel Studios' Captain America: The Winter Soldier and reports suggest that the role is likely that of Brock Rumlow, better known as Crossbones.
Grillo himself tweeted earlier today about a visit to Los Angeles and a meeting with Marvel along with the hashtag "#captainamerica". The tweets have since been deleted, but the official Twitter feed of The Matthew Aaron Show has repeatedly made the claim that Grillo was auditioning to play Crossbones and, what's more, that he's allegedly very close to getting the part.
First introduced in the comics in the late 1980's, Crossbones is better known today for his major role in Ed Brubaker's modern arc on "Captain America." A highly trained mercenary working for the Red Skull, Crossbones played a major role in the assassination of Steve Rogers following Marvel's "Civil War."
Although Crossbones' potential appearance in the 2014 sequel is far from confirmed, Brubaker's "Captain America" comics, as evidenced by the Winter Soldier title, are certain to serve as a major inspiration for the Stephen McFeely screenplay.