Raley isn't in the lineup for Thursday's game against the Orioles due to the flu, Daniel Kramer of MLB.com reports.
Mariners manager Dan Wilson said that Raley is over the back tightness that caused him to miss the last two games, but the outfielder has since caught a flu bug. Raley is expected back in the lineup Friday. In the meantime, Miles Mastrobuoni, Victor Robles and Dominic Canzone will form Seattle's outfield trio Thursday.