Here are the choices:
Obomanu can play all three receiver positions, and knows the offense better than the other options. That means Darrell Bevell could run the full range of plays without hesitation.
Edwards practiced at split end throughout camp. He has shown he still has a knack for making plays down the field, and his height presents problems for opposing corners.
Martin is a more logical slot receiver, but he can play multiple spots, and is the type of player coaches have confidence in.
Doug Baldwin + Anthony McCoy/Evan Moore
Baldwin is coming off his own injury, and we can’t be sure he will play until he takes the field. The coaches could choose to run two receiver sets featuring Baldwin and Rice that likely would include more two tight end sets. Baldwin is one of the best receivers on this team, so more time for him is never a bad thing.
My first instinct is to assume Edwards takes the starting role. He is sexy pick as the new player who has flashed big-play potential, but Obomanu seems the most likely. The team has started him multiple times the past two years, and knows what they are getting with him. The defense may dictate which of these combinations get the most play in the first game, so who starts may not be the guy who gets the most snaps.
The starter may change in the next few weeks depending on how things play out in the first game. Edwards feels like the guy who should ascend, and if he does, the job may not be there for Tate when he returns.