Biggest voids created by FAs

A.J. Pierzynski was arguably the White Sox's MVP last year, and they have not replaced him. Jonathan Daniel/Getty Images

As this offseason's free-agent class has been shaken and largely settled, some of the jilted teams are left in fine shape. Some immediately went out and patched the hole -- the Atlanta Braves, for instance, grabbed B.J. Upton immediately to fill the Michael Bourn void -- while others had replacements ready to go, making their free agents expendable.

Not everybody was so lucky or so prepared, however, as one can see by observing the voids forming where free agents used to be.

Here's a look at the five positions where teams are still scrambling to replace talent or will need an in-house option to exceed expectations lest they face a looming black hole at the position.