His save percentage went up last year. His numbers stayed mostly where they were the three previous years. His "terrible" year was one of 27/32 in saves and the same K/9 as usual. He had elbow problems for part of the year which led to his WHIP being over 1.25 for the first time and his FIP over 4.25 for the first time. Even with the health problems, and control issues it caused, he was still effective and he had a better year finishing games than his previous 3.
Of course that requires looking at something other than ERA for five seconds and doing some actual analysis.
So SF dogs you for being ready to dig up a crappy stat, and you prove him right by using "save percentage"? Oy vey.
For whatever reason, Capps was hit much harder last year than ever before. Still had similar control, still struck guys out at a respectable rate, but his HR and hits allowed went way up. That could be a fluke.
I think it's worth seeing if it was a fluke and going after him.