The Indianapolis Colts are limping into their showdown at Houston on Sunday.

The club signed running backs Deji Karim and Mewelde Moore and placed running back Donald Brown and fullback Robert Hughes on injured reserve Tuesday.

Hughes (knee) was hurt on the same third-quarter punt return that took out running back Delone Carter (ankle) Sunday. Vick Ballard was the team’s lone healthy running back by game’s end against Tennessee.

Brown injured an ankle the week before at Detroit.

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