McClain was credited with six tackles (two solo) in a 34-10 loss to the Cincinnati Bengals on Nov. 25, 2012. He was suspended for conduct detrimental to the team for two games and was inactive the rest of the season. The Raiders waived him following the season.
McClain gets to see his former team Tuesday when the Raiders come to Oxnard, California, for two days of practices with the Dallas Cowboys.
"I still know a few guys on that team, so it will be good," said McClain, who was the eighth overall pick of the 2010 draft. "But it will also be good to put my pads on a few of those guys."
The Cowboys picked up McClain in a trade from the Baltimore Ravens after he retired twice before camp. He was limited in practice last week with a case of knee tendinitis but returned to the field on Sunday after missing the preseason opener against the San Diego Chargers.
"I wish I could've played," McClain said. "I wish I could've been at practice, but the most important thing is to get healthy and as healthy as I can get. But I felt a little out not being in practice. No matter how I felt I wanted to go out there and practice (Sunday)."
"I like the progress that he's making," Cowboys owner and general manager Jerry Jones said. "He's trying to play it into shape rather than sitting over there running and getting in shape then go play. But when he makes a play you can see the quality of the play, just like the one he made on Murray. He's a difference-maker out there, if we can just get him out there."