Now most of this is just pure speculation, but other possible replacements I've seen mentioned are Kevin Youkilis, Asdrubal Cabrera, Stephen Drew, Eric Chavez, Hiroyuki Nakajima, Jeff Keppinger, Chase Headley, Mark Reynolds, Scott Rolen, Jerry Hairston Jr. and Marco Scutaro. For more on these possible 3rd base replacements, check out this article by Joel Sherman.