This move was made seemingly in conjunction with the acquisition of RB David Fluellen from the Eagles in exchange for K Cody Parkey.
Tanner, 25, signed with the Cowboys as an undrafted free agent out of Middle Tennessee State back in 2011.
It appeared that Tanner had an outside shot to make the team, but the front office clearly prefers Fluellen. The Colts’ running backs have been either hurt or underwhelming thus far in preseason, so there could be an opportunity for Fluellen.
Tanner appeared in 39 regular season games over the course of his three-year NFL career and has totaled 149 yards rushing on 56 carries (2.7 YPC) and two touchdowns.