TNA's president, Dixie Carter, took to Twitter on Thursday to tease the signing of a "big free agent" to the roster.  The Tweets read as follows:

"Our biggest summer ever starts tonight...huge BFG series planned, plus major events like Slammiversary in Boston this (Sunday).  The ink is just drying on the BIG free agent that will rock #impactlive on Spike TV.  Tune in and join us on this summer adventure."

You can follow TNA president Dixie Carter on Twitter at Twitter.com/TNADixie.

Well, it's time to fire up the Magic 8 Ball and see who this mystery signing is.  The current pool of free agent wrestlers seems a bit on the thin side right now so it definitely has me scratching my head.  I highly doubt it's Dave Bautista - as he would more than likely head back to a bigger payday in WWE.