Better late than never, Andrew Bailey is ready for his Red Sox debut.

According to a team source, the Red Sox intend to activate Bailey from the disabled list before tonight's game in Baltimore, the opener of an all-important three-game series against the Orioles. The two-time All-Star closer passed his final test by retiring all four batters he faced Sunday night for Triple-A Pawtucket.

Acquired in a December trade with the Oakland Athletics and expected to replace Jonathan Papelbon [stats], Bailey has been sidelined since the start of the season after undergoing right thumb surgery on the eve of Opening Day. All along, the Red Sox had targeted an August return for Bailey, although it isn't clear how he'll be incorporated into the bullpen.