There is a lot of talk out there on the various websites, indicating that Jenks could very well lose his closing job to Neal Cotts.Before Jenks' 4 run inning on March 23rd, he was actually having a pretty decent preseason.
He did not lose 10 mph on his fastball, as reported last week. He has most definitely had control issues, and Guillen is concerned.
My opinion: if you have Jenks on your fantasy team, hold on. But, if you can, pick up Cotts as an emergency option.