Hart (knee) began a rehab assignment at Triple-A Tacoma on Saturday, going 0-for-3 at the plate. Hart will require at least a couple more games with Tacoma, after he missed the previous three weeks of action due to a bruised right knee. The Mariners figure to bring him back from the DL when rosters expand in September, but since he's only on a one-year contract and batting .203/.278/.314 on the season, don't expect the Mariners to give him regular at-bats.