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The 49ers brought in some help for their banged-up defensive backfield on Tuesday with the signing of first-year cornerback Marcus Cromartie to their 10-player practice squad.
The 49ers waived tight end Xavier Grimble from the practice squad to make room for Cromarie.
Tramaine Brock is expected to miss another game with a hamstring injury he sustained against the New Orleans Saints.
The 49ers placed Jimmie Ward on injured reserve on Saturday with a broken foot. He is out for the season with a recovery time that’s expected to take 12 weeks, according to a source.
Cromartie (6 foot, 195 pounds) spent 15 weeks on the San Diego Chargers’ practice squad last season after playing his college ball at Wisconsin. He was promoted to the active roster for the final two games but did not play.
The Chargers released Cromartie from the practice squad last month. He spent one day with the Cleveland Browns before he was released again.
He is a cousin of Arizona Cardinals cornerback Antonio Cromartie and New York Giants cornerback Dominique Rodgers-Cromartie.
Cromartie was one of three defensive backs, including Drayton Florence and Dominique Franks, the 49ers worked out on Monday, according to the league’s personnel notice.