1. Travis Homer does not have much tread on the tires
As noted, Travis Homer played about 81% of his snaps on passing downs. So, he was not used much as a runner. When you add in that he did not have a huge snap count, to begin with, there is very little tread on those tires.
Travis Homer has 83 rushes for 453 yards throughout his entire career. He also has 52 catches for 464 yards. There can be two ways to look at it. First, the Seahawks never trusted him to run the ball, what does that tell you?
The other thought is that Homer still has a lot of wear and tear ahead of him, especially with his athletic profile at age 25. The Chicago Bears could be using him more as a runner. Oh, and he does happen to be averaging 5.5 yards per carry, which is not too bad.
So, even if they do not go to him for more than 100 carries a season, the time they do go to him they are expecting pretty big gains. The combination of his ability to create big plays, work on special teams and pick up the blitz to complement Khalil Herbert add up to why he was signed.