As of right now, I'd think we're done for this offseason - barring a trade or cutting someone, or a low cap hit (under $2m).
Spotrac has us at $14,126,031 space not including Higgins, Walker, Jackson, Senat, Lee, or Natson.
Assuming these all stay... Higgins has a 2.38M cap hit, and it drops off 780k from the top 51. Walker has a 3.5M cap hit, and it drops off a 826,652 salary from the top 51. Jackson has a 4.5M cap hit and it drops off a 850k salary.
Under a 2nd assumption that all of these salaries are less than 850k, and thus wouldn't show up in the top 51, we have about $6.2M cap space. This includes the space needed for the rookies.
Overthecap and Spotrac are starting to get these contracts on their sites. It looks like we did some of the future voided years deals to spread the cap hit out.
For example, Walker's 1 year deal is actually a 3 year deal with 2 years voided. This means year 1 cap hit is 1.836M and dead cap will be 1.164M next year. That is essentially 1.164M more we can theoretically spend this season.
As of now, both sites show about 12.5M in cap space with a couple guys not accounted for. Nonetheless, instead of the 6.2M estimate, it is likely closer to $10m and we can spend about $5m of that without impacting rookie pool. All estimates, but we can sign others if we want.