The San Francisco Giants will attempt to complete their first four-game road sweep over the Colorado Rockies since 2011 when the clubs, who are tied for third place in the National League West, meet on Wednesday afternoon. The first three games of the series, all Giants wins, have included a blowout, a pitchers' duel and a 10-inning affair Tuesday night that was a little of both. The Giants appeared on their way to a third win in two days before the Rockies rallied for three in the ninth against All-Star Will Smith, only to see their own closer, Wade Davis, serve up a four-run 10th in an 8-4 defeat.