Two players fighting for back-end roster spots suffered injuries on Day 2 of Detroit Lions training camp that will keep them out of practice Friday.
Lions coach Dan Campbell said undrafted rookie running back Greg Bell hurt his back and hip on the second-to-last play of Thursday's seven-on-seven session.
Bell was injured running a pass route, and clutched near the back of his leg as he crumbled to the ground.
[ Lions' Dan Campbell feels your pain. He and his staff want to use it as fuel ]
The Lions brought a cart out to help him off the field, but he walked gingerly to the locker room with the help of trainers.