Ross has signed a minor league deal with the Red Sox.
The Red Sox, adding catching help for the stretch drive, have signed David Ross to a minor-league contract, according to major-league sources.
Ross, 31, drew interest from the Red Sox and Phillies after getting released by the Reds. He will report to Class AAA and eventually become the Sox's third catcher behind Jason Varitek and Kevin Cash.
The Sox would need to promote Ross by Aug. 31 to make him eligible for their post-season roster. Ross also could be added for the playoffs if Varitek or Cash were injured.
In 52 games with the Reds this season, Ross batted only .231 but produced a robust .381 on-base percentage.
The Red Sox will be his fifth team, and first in the American League.