.The fourth in a series of at least four, on how close selected Dodger prospects are to the majors ...Rubby De La RosaVitals: RHP, 6-foot-1, 170 pounds, turns 22 on March 4.Summary: We're talking about him because he leapfrogged other Dodger prospects to become the organization's 2010 minor-league pitcher of the year. De La Rosa impressed in a short rookie-ball stint in 2008 (47 1/3 innings, 51 strikeouts, 1.71 ERA) before a lost 2009 in which he managed only 16 1/3 innings and allowed 11 runs (while still striking out 22). He was suspended for 50 games on July 27 of that year for violating the minor league drug prevention and treatment program, according to the Dodgers media guide.But the Rubby-bandwagon got rolling again last season. De La Rosa came back strong at the start of 20