I would rate them as such:
Walker-Assuming you are talking about Larry. I think have Vinny back in town will help larry get back on track. look for him to have a great year.
Drew-He will get a ton of chances to replace sheffield. he will be under the microscope
Phelps- Should have a very good year
Byrd-I like him especially if you are in a keeper league but wait until next year.
Lofton- He will have a hard time getting the at bats on this team. Just not high on him as much.