During the Indianapolis Colts' third training camp practice on Friday, there were some noteworthy developments at a pair of positional battles taking place.The first came at wide receiver, where, most notably, the WR3 role is up for grabs. Emerging on Friday was Nick Westbrook-Ikhine, a free agent signee by the Colts.According to Kevin Bowen of 107.5 The Fan, Westbrook-Ikhine hauled in two completions, including an "underthrown deep ball" from Daniel Jones. His second reception came with Sauce Gardner in coverage.The Indy Star's Joel Erickson wrote that Westbrook-Ikhine "has made the most of his plays" through three training camp practices, using his size to his advantage. Erickson added that this was the first "big day" for any player in the WR3 competition.What about the backup running back role?Competing for this spot on the depth chart are primarily DJ Giddens and Seth McGowan. For Giddens, however, it's been a bumpy start, with him dropping a pass on Friday -- something that's occurred one other time in three practices as well.Giddens brings some burst to the backup role, while McGowan is the more physical runner and has been steady.The ability to contribute on passing downs will go a long way in determining who wins this competition. That, in part, was why Giddens' role in Year 1 was often minimal.This article originally appeared on Colts Wire: Latest intel on 2 Colts position battles after Day 3 of training camp