I don't understand why there's so much doubt about Welker's role. The following four points seem pretty obvious to me: 1. He'll start. At that price, he'll start. 2. He has a similar skill set to Branch. So he's likely to be used similarly. 3. One difference vs. Branch is that he has proved he can take a hit and get up from it. Thus, it's more likely than it was with Branch that in 3+ WR sets he moves over to the slot position. 4. If he's significantly better than his teammates at punt and/or kick returns, he'll get that duty. If it's a tie or near-tie, however, the less valuable player will get the job, while he is saved for other kinds of plays.