Gregor Blanco is certainly a buy-low candidate. He was below replacement-level in 2016, but over the four previous years in San Francisco, had averaged 1.7 bWAR and 2.3 fWAR. He turned 33 on Christmas Eve, so hopefully won’t be falling off a cliff yet. His problems last season were mostly at the plate, where his OPS dropped over 160 points from the 2015 figure, as Blanco posted a line of .224/.309/.311.
The good news is, a nagging shoulder injury may have been responsible, manager Bruce Bochy saying in August when Gregor went on the DL , "I think [Blanco's injury] did start gradually and has been getting worse and worse to the point where he couldn't get a good swing off.