49ers coach Kyle Shanahan offers new reason for Colin Kaepernick's free agency

Just when you thought you've heard it all.

Why is Colin Kaepernick still a free agent? Politics? Poor play? Vegan diet? All of those have been discussed, but now there's yetanothertheory, this time courtesy of 49ers coach Kyle Shanahan.

The newly signed coach, who never actually worked with the quarterback, was speaking Monday at the49ers auditorium. Asked about Kaepernick, Shanahan said he thinksthe QB remainsunsigned because it would force a teamto switch its offense in order to match his skill set.

Via 49ers transcript:

"I think just the experience of doing that type of stuff, you don’t just run stuff and think you’re going to be good at it right away. You’ve got to commit to it and work at it year round, and it’s all the positions. When all your quarterbacks have different ways to be successful, which I’ve been in situations like that and you try to prepare them best, it does take a toll on your offense. What are you trying to get good at? You can’t practice everything. You can’t be great at everything. You’ve kind of got to commit to something and do it over and over and over again and once the type of running game or drop-back game, you’re going to commit to one quarterback is completely different than the other, then that does affect your team. That’s why I think it can be harder when those type of guys are going through competitions and stuff and like that because even though you’re trying to find the best guy, by trying to be fair to those quarterbacks you’re also being unfair to a team. You don’t really know what direction you’re going. So, if you have your pick of the best world, you’d like those guys to be somewhat similar, not just because that’s how you want the quarterbacks, just because of the work you’re doing for the rest of the guys on the roster.”

This explanation does make some sense, at least in terms of why a team hasn't sought the QB as a starter. His passing skills aren't spectacular because he really makes an impact as a rusher. But having a talented backup could work out if a team really wanted to make it happen.

Before Kaepernick took over as starter in 2012, coach Jim Harbaugh used him as a weapon in the red zone and the QB had three scores on the ground. There are other teams that have used mobile quarterbacks in certain packages as well, and Kaepernick has the skill set for something like that.

At the end of the day, there isn'tonefactor keeping Kaepernick unsigned. There are a number of reasons teams don't feel the urge to bring him on board.

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