Liriano will begin a throwing program on Tuesday as the Minnesota Twins left-hander tries to come back from the disabled list. The rookie had a mildly strained ligament but the team is concerned it could keep him out for the season. The team refuses to put a timetable on a return. (Updated 8/20/2006) Analysis: Liriano is 12-3 with a 2.19 ERA. He hasn't pitched since Aug. 7.