Brady was good for me last year, but he has never shown any history of being a solid fantasy contributor outside of the 2005 season. Even then, he was only really helpful last year for runs and average, and he won't do anything for you in those categories right now with his .200 average and hitting in the 8th spot in front of the pitcher.
Billy Hall has a higher fantasy upside than Clark does, if you can get him. Gabe Gross also might steal at bats in the OF, so I think Clark's hold on the everyday CF spot there is far more tenuous than it was last year.
You've got a diamond, You've got nine men
You've got a hat and a bat, And that's not all..