Again, my concern is not about him beating out Free in 2015. My concern is that Parnell played 5 regular season games and both playoff games last season. Free had 2 ankle surgeries in a 1 year time frame and is now 31. My concern is finding the very best backup OT possible. Green or Weems need to look terrific if the Cowboys are going to have Collins replace Leary.
IMO, if they have Collins focus on LG in training camp, then he won't be ready to play OT if Free is injured again. I don't think they could just move Leary back to LG and move Collins out to Tackle in that scenario.
There obviously are many ways this could go. One that I've kind of thought possible since we signed La'el is:
Play Collins at LG and RT through camp with the thought that he will win the LG spot. Train Green or Weems as the swing tackle for game days.
Then, let's say Free gets a high ankle sprain and will miss 5 weeks. During the game that he gets hurt, Green comes in and finishes the game at RT. However, that week of practice, they could get Collins ready to start at RT and Leary ready to go in at guard. Teams do things like that all the time. All you would have to worry about Green for is part of 1 game.
Now, the thing is, the team would have to give Collins pretty significant snaps at RT during camp to have the transition go pretty smoothly... but it is something they could do.
I do think Collins is smart enough and talented enough for this very scenario.