Randal Grichuk greeted Padres reliever Steven Wilson with a three-run homer to cap a five-run, fifth inning and right-hander Antonio Senzatela held visiting San Diego to one run over six innings Sunday afternoon as the Colorado Rockies scored a 8-3 win to complete a three-game sweep at Denver.The Padres lost offensive leader Manny Machado in the first inning when the National League MVP candidate turned his left ankle sliding off the first base bag on a groundout. X-rays were negative and Machado, who was helped off the field, was diagnosed with a sprained ankle.The win was the Rockies 10th straight over the Padres at Coors Field. Before Friday’s series opener, the Rockies had lost seven straight home games. The Rockies are now 5-2 against the Padres this season and out-scored them 23-11 in the three-game series.Senzatela (3-3) allowed one run on six hits and two walks with three strikeouts over his six innings to lower his ERA from 4.79 to 4.42. He is now 8-3 in his career against the Padres.Padres starter Blake Snell (0-4) was charged with five runs (four earned) and five hits over 4 2/3 innings. He struck out five and walked four.Snell and Senzatela were engaged in a 1-1 stalemate entering the bottom of the fifth.