Eric Winston never made it to St. Louis yesterday after it was previously reported that he would do so. That probably should have been taken as a bad sign for everyone courting him except for the Chiefs.
The nature of the Lions interest in Winston is not obvious. They may have been looking at a simple talent upgrade since Winston is one of the best right tackles in the game, although some have speculated that the Lions could have been looking at him as a left tackle to replace Jeff Backus.
Still, the Lions have other free agent options along the offensive line. Geoff Schwartz tweeted positive things about his visit yesterday and Marcus McNeill was also in for a visit on Friday. Schwartz can play guard or tackle while McNeill appears to only be an option if the team does not re-sign Jeff Backus. (update: the Lions have re-signed Backus)