According to Jon Heyman, the Pittsburgh Pirates are one of several teams interested in Ben Zobrist. Heyman calls the interest "huge" and named five teams, plus said several others are involved. Zobrist's name was mentioned for the Pirates the other day before the Aramis Ramirez deal, so that isn't news, but the amount of teams involved could change things.
Zobrist has had a tough season, starting off slow as he was bothered by injuries. He has picked it up recently on offense(.810 OPS in July), but the defense has been well below average. He has had success in the past, so he would still be a nice piece to add.