Anderson will be placed on the 10-day DL with left knee inflammation, Thomas Harding of MLB.com reports.
Anderson missed a start earlier this season with the same injury and has been pitching in a knee brace, but said he felt good after going through normal pitching drills Saturday. Nonetheless, manager Bud Black wants to exercise caution with putting the young arm back on the rubber. "We're going to play it safe," the manager said. "He feels okay, but we're being precautionary." Shaking up the rotation may not be the worst idea after Anderson's dreadful last outing in which he allowed six earned runs on 11 hits against the Mariners, though he should be back in the rotation upon his return from the DL. Jeff Hoffman will assume his spot in the rotation for the time being.