Kevin Clark speculates where defensive tackle Christian Wilkins could sign after being released by the Raiders. (0:32)Christian Wilkins, who was released by the Las Vegas Raiders on Thursday, kissed a fellow player on the head and the teammate took offense to it, a source told ESPN's Adam Schefter. He was released with the designation of terminated vested veteran, sources told Schefter. One source told ESPN that the interaction was "playful," but the teammate didn't see it that way. A complaint was filed to the Raiders' human resources department, which investigated the incident, a source told Schefter.