Amari Spievey’s season is over. The Detroit Lions safety suffered a concussion in the Oct. 22 loss at Chicago and has not been cleared for contact since then.

 Spievey was placed on injured reserve on Saturday.

 The move makes room for the addition of cornerback Drayton Florence to the 53-man roster. The 31-year-old Florence, who broke his arm in the Sept. 16 game at San Francisco, is coming off the short-term physically unable to perform list.

 Florence, a 10-year NFL veteran, was signed by the Lions on Sept. 2 after he was released by the Denver Broncos.

 Chris Houston and Jacob Lacey are expected to start at cornerback, but defensive coordinator Gunther Cunningham indicated on Friday that Florence could see plenty of action Sunday against the Packers. If needed, Florence could help out at safety.

(Paula Pasche covers the Lions. Follow her on Twitter @PaulaPasche. Read her Lions Lowdown blog at oplions.blogspot.com.)