Team Health Holdings Inc. is exploring a sale to a private-equity firm, according to people familiar with the matter, a year after the healthcare-services firm rejected a takeover offer from a rival. Team Health, which had a market value of $2.4 billion on Tuesday afternoon, is in talks with Blackstone Group LP and Bain Capital and could reach a deal to go private this month, some of the people said. As always, the talks could fall apart before a deal is reached. [Registration required.]