There are indications that it will be a challenge for the 49ers to get Michael Crabtree signed before the start of training camp. Again, there is still a lot of time to get something accomplished - and only two first-round picks have signed deals -- but the 49ers and Crabtree are currently far apart in their negotiations.
If history tells us anything it's that Crabtree's agent, Eugene Parker, does not mind engaging in holdout tactics. (Technically, an unsigned rookie is not a "holdout" because no contract has been agreed upon. I'll try my best to refrain from calling it a holdout. Rather, it's a contract stalemate.) At least four of Parker's clients had contract issues last season.