Castilla, who missed Friday's game while attending to a personal matter, was 2-for-4, leaving him two hits short of tying Jorge Orta (1,619) for most by a Mexican-born player.
Wilson hit his first homer of the year off Mike Maroth (5-6) in the fifth inning. He was 2-for-5 to end a 4-for-43 slump that started when he came off the disabled list June 18.
Jason Jennings (7-7) was shaky in his five innings, allowing nine hits, five walks and six runs, but still picked up his fourth straight win at Coors Field. Charles Johnson added three hits.
Randall Simon's opposite-field groundball double drove in two runs Saturday to break a sixth-inning tie as the Pittsburgh Pirates won their eighth successive game, beating the Milwaukee Brewers 5-3.
Jason Bay, coming off an eight-RBI performance in the second game of Friday's doubleheader, added an RBI single to help the Pirates win their ninth in 11 games since they dropped 19 of 22. The winning streak is their longest since an eight-game run Sept. 1-8, 2000, during Gene Lamont's final month as manager.
Bay has 10 RBIs in the first three games of the four-game series that wraps up Sunday.
"We're just trying to keep it up and keep the momentum going as long as we can," Simon said. "We know we can beat anybody. We're putting offense, defense and pitching together and everything is just fine."
Benson (6-7) pitched seven innings to win for only the second time in seven starts. Benson's contract is up after this season and, with the Pirates not looking to re-sign him, likely will be traded this month.
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