When Foster went down early in the 3rd quarter after getting his ankle rolled up on, Trai Essex came in at RG rather than Chris Kemoeatu.
That tells you that Kemo's days are numbered in Pittsburgh. Granted Chris is a more natural LG than a RG, but still you would normally feel that a starter or former starter would come in for those situations. Trai Essex doesn't exactly instill fear in anyone but usually you'd think he would take a back seat to Kemoeatu, but that's no longer the case.
His sub par play, bonehead penalties, and nagging knee injury that continues to swell up on him will be his ultimate downfall when the season is over.