As much as his behavior has drawn the ire of his Giants teammates this season, I can report that OBJ's hip injury has nothing to do with the swift application of a boot to the WR's posterior region. Beckham is reporting soreness from an injury that was sustained against the Ravens last week, causing to miss a series before returning to contribute the best game of his career.
His absence from the game this weekend in London would put a serious damper on the Giants chances, but given Odell's history as a competitor Rams coach Jeff Fisher is taking no chances.