Injury updates: Shackelford, Suarez, Lorenzen

Shackelford K's Happ, the side CINCINNATI -- The Reds activated reliever Kevin Shackelford from the 10-day disabled list on Tuesday, designating reliever Kevin Quackenbush for assignment to clear a spot on the 25-man roster.

Shackelford, 29, has been out all season with a right forearm strain he sustained near the end of Spring Training. Five of his first six Cactus League appearances were scoreless, but he allowed five earned runs over his final two appearances and 2 1/3 innings before realizing he was hurt.

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Last season, Shackelford posted a 4.70 ERA and a 1.40 WHIP in 26 appearances for the Reds. He spent most of the season with Triple-A Louisville, where he had a…