SARASOTA, Fla. - Derrek Lee isn't in today's lineup, but we're told that he'll replace Vladimir Guerrero as the designated hitter later in the game For the Orioles: Brian Roberts 2B Nick Markakis RF Matt Wieters C Vladimir Guerrero DH Luke Scott LF Adam Jones CF Mark Reynolds 3B J.J Hardy SS Jake Fox 1B Zach Britton LHP Update: Justin Duchscherer threw off flat ground again today and is scheduled for a bullpen session tomorrow. He's aiming to pitch on April 10, when the Orioles need a fifth starter. Brendan Harris is unavailable again today after having a second procedure to remove a mole from his back. The first procedure occurred before spring training. He's hoping to play tomorrow night or Thursday.