He's not a lock, but I take clues from listening to Ballard during interviews and noticing whom he mentions and does not mention. Just a few days ago on JMV, when talking about the front 7, he mentioned...
Sheard, Simon, Basham, Ayers, Edwards, Mingo, Hankins, Woods, Anderson, Ridgeway, Hunt.
There are a couple names conspicuously not mentioned, excluding the rookies. Remains to be seen if there is any significance to this.
Edit: Sorry, I think he was talking about OLBs and D-Linemen