James Loney hit his second career grand slam and hard-throwing rookie Rubby De La Rosa pitched five effective innings before exiting with a forearm cramp, helping the Los Angeles Dodgers hold off the Colorado Rockies 10-8 on Sunday. Matt Kemp hit his NL-leading 20th homer and Rod Barajas added another as the Dodgers concluded their 10-game road swing with a 5-5 mark.