MKRob Sports

The San Diego Chargers have made another move official in the secondary and appear to have dodged a bullet in the defensive backfield, too.

Cornerback Antonio Cromartie left practice yesterday after tweaking his knee and had an MRI last night, sources said. The MRI confirmed there were no tears but that Cromartie has a slight bruise under his kneecap.

A serious injury to Cromartie, coming off one of the best games of his career, would have played havoc with a secondary in flux.

It is still possible Cromartie could be limited Sunday in Kansas City, which would have a bearing on the move made in the secondary this week.

Defensive coordinator Ron Rivera on Wednesday made a switch he had clearly been contemplating for weeks.

Steve Gregory, who has been practicing at the nickel spot since the bye week, will be there Sunday against the Chiefs in place of Antoine Cason.

Rivera said it was more that he thinks Gregory is better suited to play there than that Cason had done things grossly wrong.