The spring ends on its highest note ...Dodgers 8, Mariners 1Highlights:Pitching in Dodger Stadium for the first time, Rubby De La Rosa struck out four of the six batters he faced and went on to dazzle with two-hit, no-walk shutout ball over 5 2/3 innings with six strikeouts. Legendary hitter Ichiro was two of those strikeouts.Ivan DeJesus Jr. went 2 for 2.Jerry Sands (1 for 2) and Dee Gordon each made diving catches.Corey Smith completed his ridiculous spring with a three-run homer, leaving him 7 for 11 with four walks, two doubles and three home runs.Andre Ethier doubled in the game's first run, and James Loney followed with a two-run single to give the Dodgers a 3-0 first-inning lead.Marcus Thames homered in the fourth.Randy Keisler, who came out of the Dodgers' open tryout camp