I revisited this thread because I do not think this was really analyzed for what it could be--our future LT.
What do we actually know about him? The guy is the same height Gross is, and weighs 15 pounds less. He has fairly long arms, longer than Kyle Long, a raw project drafted in the first round. He has good feet and good athleticism. He is 23. He has only played DT for 2 seasons (1 in college, and 10 games here) and he managed to win a roster spot on an NFL team after 6 weeks.
We also know that the coaches seem to like him.
I found it very odd that, after free agency and the draft, we had only 4 OTs: Gross, Campbell, Bell, and Garry Williams. We cannot be satisfied that these 4 are all we might need. I am willing to bet that Chandler (and possibly Rivera) thinks he can beat out Campbell or Williams. I would not bet against that.
Now take a look at Chandler's background. Aside from possessing adequate height and arm length, he has a pretty solid background for preparing one for LEFT tackle, aside from actuallly playing LT. Let's face it, many college offenses do not require the same skills that the NFL does at the position, so do not overestimate the college experience. He was a TE, which tells me that he has athleticism and feet. Many LTs in the league were once TEs. Lane Johnson was drafted 4th overall--he is a raw TE convert to T. However, Chandler has 2 years (1 in college) experience at DL. Two years of learning what the Defense does to win battles. Two years of tough pounding.
Chandler will be raw, but he will have at least a year to develop. I think he is PS eligible, so he could develop without taking a roster spot. If he is able to put it all together, what do other Tackles have that he does not?
This could be nothing, but I think it is a brilliant move that could pay off in a huge way. Imagine if we could enter next year's draft unconcerned about the LT position? I think Chandler has the raw ability to be our next LT down the road. If not, he was a fifth T on the PS.