WASHINGTON (Interstat) — The Arizona Diamondbacks open a three-game series against the Washington Nationals on Friday night at Nationals Park, with first pitch set for 7:05 p.m. under clear skies and 80 degrees. Arizona (54-49) brings a two-game winning streak into the matchup after a 10-6 victory at St. Louis on Thursday. First baseman Tyler Locklear went 3 for 5 with a home run and three RBIs in that game. Locklear is 5 for 10 with a homer and five RBIs over his past three games. The Diamondbacks have won four of their past six. Washington (52-51) is coming off an 8-0 win at Colorado on Wednesday. Right-hander Cade Cavalli tossed six scoreless innings, allowing four hits with eight strikeouts. Cavalli has allowed two earned runs or fewer in four of his past five starts, posting a 1.93 ERA over that span. The Nationals won two of three in the teams’ previous series this season, June 5-7 in Arizona, including a 14-1 victory in the finale. Arizona is a -1.5 favorite in the betting line, and the over/under is 9. The Interstat game simulator projects an 8-5 Diamondbacks victory. The series continues Saturday and Sunday before Arizona travels to Pittsburgh for three games and then to Cleveland. Washington hosts Toronto for three games after the series, then visits Atlanta.