The Dodgers announced they have signed outfielder Mario Songco, a fourth-round pick out of Loyola Marymount University, and have assigned him to advanced Rookie ball in Ogden, Utah, for the start of the Pioneer League season next Tuesday.

Songco, a 2006 graduate of Alemany High in Mission Hills, was the only player from the West Coast Conference named to the semifinalist list for the 2009 USA Baseball Golden Spikes Award, given annually to the best amateur player in the country.

He hit 34 career homers in three years at LMU to rank seventh on the school’s all-time list.

The 20-year-old led the team in 2009 with a .360 average, 15 home runs, 63 RBIs, a .678 slugging percentage, and a .481 on-base percentage.