Injury report: Rashean Mathis has a concussion, Calvin Johnson limited at Wednesday practice

Creeping back up on Rashean Mathis came a concussion, forcing the veteran cornerback to sit out Wednesday practice. ESPN's Michael Rothstein reports that the concussion was sustained in Week 7 during the game against the Minnesota Vikings. For now, Rashean Mathis is sidelined and did not practice on Wednesday as the Detroit Lions got back to practice following the bye.

Concussions are dangerous, tricky things. From Rothstein's account, Mathis was suffering symptoms before the London game against the Kansas City Chiefs but the team's medical staff did not think they were related to the blow Mathis suffered against Minnesota. Mathis was ruled out against the Chiefs; it's now clear that the initial reasoning for "illness" was that the symptoms had grown worse.

Calvin Johnson was the other notable piece of news from Wednesday's injury report, as he was limited in practice with an ankle injury. Travis Lewis was the only other Lion limited in practice with a groin injury. For the most part, the Lions injury report has shrunk significantly since London, a positive sign for team health outside of Mathis's situation. The full injury report follows.

Detroit Lions injury report 11/11/2015

CB Rashean Mathis (concussion): No practice

WR Calvin Johnson (ankle): Limited practice

LB Travis Lewis (groin): Limited practice

S James Ihedigbo (shoulder): Full practice

CB Darius Slay (head): Full practice

CB Josh Wilson (neck): Full practice