The righty has history with Red Sox manager John Farrell, having pitched for him in Toronto for 41 games in 2012.
"He will be here tomorrow. He's a guy that's got a lot of experience in the back end of the bullpen," Farrell said. "I have personal familiarity with him from when he was in Toronto. Given some of the numbers in camp, there's been nothing guaranteed to [Cordero], but it's a chance for him to come in and demonstrate what he still has."
Cordero has been well-traveled in his career, pitching for the Tigers, Brewers, Reds, Blue Jays, Rangers and Astros. He is a three-time All-Star and has a 3.38 ERA over 14 seasons.
Ian Browne is a reporter for MLB.com. Read his blog, Brownie Points, and follow him on Twitter @IanMBrowne. This story was not subject to the approval of Major League Baseball or its clubs.