Lilly is recovering from offseason shoulder surgery.
Cubs manager Lou Piniella said Lilly will throw in minor-league games starting on March 27. With Cactus League starters progressing to five and six innings, the team felt it would be better to have Lilly start a minor league game, rather than be the second or third pitcher late in a Cactus League game.
Piniella said Lilly -- like all pitchers in spring training -- will start by pitching two innings and work his way up.
The Cubs are hoping that without any setbacks, Lilly will join them in the second half of April.