At one time, the only question regarding the Sox was who would be its new owners. But now that the $665-million plan to build a ballpark right near Fenway Park appears to be going nowhere, potential team owners are scrambling to come up with other options for a new ballpark.

The 15-acre site near South Station owned by the US Postal Service currently houses a mail-sorting plant. The Postal Service has been exploring the possibility of relocating elsewhere but has yet to receive approval for the move.

Other sites currently under consideration for a include a one along the waterfront here in South Boston on a 25-acre parcel owned by developer Frank McCourt, who has been aggressively campaigning among potential bidders to have his property considered. A beleaguered racetrack in East Boston in which Joseph O'Donnell--one of the bidders for the team--already holds a large ownership stake, is also being considered as is a swath of state-owned land near the Reserved Channel in South Boston. Ironically, this was the site on which the New England Patriots proposed building a new football stadium, an idea that was shot down because of fierce local opposition.