Seeking to add roster depth amid concerns about running back Ahmad Bradshaw's health, the New York Giants auditioned a number of veteran running backs for a vacant roster spot, according to multiple reports. The defending Super Bowl champions took a look at former Steelers running back Mewelde Moore, Redskins running back Ryan Torain and former Colts running back Joseph Addai. Addai is the biggest name. The 29-year-old running back has been unemployed since being released by the Colts after the 2011 season. Though he has twice totaled 1,000 rushing yards in a season, injuries have limited him to just 12 games over the past two years. The team placed rookie defensive tackle Markus Kuhn on Injured Reserve Tuesday with a torn ACL, opening up a spot for a veteran back to the roster.