When Randy Moss signed with San Francisco, the move registered about a 4.0 on the fantasy Richter Scale.
Assuming quarterback Alex Smith returns to the team, questions will nag about Moss' ability to make any kind of fantasy splash considering the questions about his quarterback's ability.
Moss could be great like he was in most of his stint with New England. Or he could be like he was in 2010.
Alex Smith could be turning the corner considering his great playoff performance against the Saints and Giants. Or he could be like he was most of 2011.
Then there are other potential free agent moves that just look like fantasy dead ends, such as Mario Manningham to the Buccaneers or Michael Bush to Cincinnati, where it looks like they're setting up a fantasy-killing committee rotation.
Not all free agent signings turn into fantasy gold. Here are six possible free agent deals that would have the greatest fantasy impact.