Carlos Quentin (knee) could begin a rehab assignment over the weekend if he continues to progress. Quentin has been doing baseball activities -- running, taking batting practice, shagging fly balls -- in Arizona in recent days, and the next step is a rehab assignment. He'll travel to San Diego tomorrow to find out if he's ready. If so, he'll start at High-A Lake Elsinore. A return in early-to-mid May appears to be in the cards.