The other thing that has to be kept in mind is that Jones is popular in Detroit. Why else bring him back for a second run?
As long as Jones performs, the job will be his.
If Rodney continues to play well, then Jones will just have less closer job security.
Exactly. He seems like a good guy to buy low on given that he did show the ability last year to not walk batters (albeit in a very small sample size). If you can get him cheap (or free if someone drops him) I think he's worth the risk given the numbers that I posted.