Colorado Rockies first baseman Jason Giambi will join fellow injured teammate Troy Tulowitzki on a rehab assignment this Friday, according to Tracy Ringolsby.

Earlier today, it was reported that Tulowitzki would report to the Double-A Tulsa Drillers this weekend to start his assignment. Now, he'll be accompanied by the 41-year-old Giambi, who has posted a .241/.380/.329 batting line in 2012. Giambi injured his left quadriceps on July 23, which affected his chances of being dealt to a contender at the deadline.

Giambi, whose mutual option was exercised following the 2011 season, has just one home run this year in 100 plate appearances, after a solid 2011 season in which he hit 13 in just 152. Over the course of his 18-year career, Giambi has homered 429 times and has a lifetime .927 OPS.

For more on the Rockies, be sure to check out Purple Row. And, for more MLB coverage, head over to Baseball Nation.