The Cubs' Derrek Lee missed Chicago's game Monday night against the Mets because of neck spasms. Lee, who leads the major leagues with a .390 batting average, went back to Chicago for tests on his neck and was not at Shea Stadium for the game. Mark DeRosa started at first base. Lee had started all 35 games for the Cubs this season. "Nothing serious, and we think he'll be here tomorrow," manager Lou Piniella said. "He's day to day. We'll see how he is when he gets here." Piniella said Lee was sent for tests because the team wanted to be extra safe when dealing with a neck problem.