The 38-year-old Delgado has not played in the majors because May well 2009 for the New York Mets. He has had two hip surgeries given that then.
Delgado is set to report to Triple-A Pawtucket on Sunday. He played winter ball in Puerto Rico in the offseason just before hip troubles slowed him.
Delgado has 473 profession property runs.
Boston first baseman Kevin Youkilis had season-ending surgery on his thumb Friday and Mike Lowell took his spot.
Delgado worked out for the Red Sox on Friday at Yankee Stadium and manager Terry Francona says he swung the bat effectively. But Francona cautioned Saturday that it is as well early to project what to expect from Delgado.
Kevin Youkilis is out with the season, so the Red Sox signed very first baseman Carlos Delgado with a minor-league contract Saturday.
Delgado, 38, has not performed in the majors considering May 2009 with the Mets. He has had two hip surgeries considering that.
Delgado, who has 473 career household runs, will go to Class AAA Pawtucket (R.I.) Sunday. He played winter ball through the offseason in Puerto Rico.
Youkilis is out to the couple of years having a thumb injury.