Giants-Pirates open a key series at PNC Park

The San Francisco Giants (57-81) and the Pittsburgh Pirates (67-71) begin a three-game series Tuesday at PNC Park in Pittsburgh, with first pitch scheduled for 6:40 m. ET. The Giants lead the season series 2-1.

The Giants arrive after playing a makeup game Monday in Atlanta, winning 7-3 as underdogs. Designated hitter Rafael Devers went 1 for 3 with a solo home run, his 30th of the season, while adding two runs and two walks. The Giants have gone 5-3 over their past eight games, and their offense has scored six or more runs in five of the past six, averaging 6.0 runs per game.

The Pirates won 5-4 in the series finale at St. Louis on Sunday, clinching the series with two wins in three games. Shortstop Jared Triolo and right fielder Esmerlyn Valdez each homered. Pittsburgh has won four of its past six games.

Pitching matchup: Webb vs. Skenes

The opener features a marquee pitching duel: Logan Webb for the Giants and Paul Skenes for the Pirates.

Webb (8-8, 3.72 ERA) makes his 25th start. He has a 1.10 WHIP, 2.2 walks per nine and 7.2 strikeouts per nine over 147 2/3 innings. In his last start, a 10-9 home loss to the Cincinnati Reds, he allowed two earned runs over six innings. On the road this season, Webb is 4-4 with a 4.16 ERA across 11 starts, and he is 2-1 with a 2.37 ERA in five career starts against Pittsburgh.

Skenes (9-11, 3.79 ERA) makes his 28th start. He has a 1.12 WHIP, 2.5 walks per nine and 10.9 strikeouts per nine over 145 innings. He threw six scoreless innings in his last start, a 1-0 win at the San Diego Padres, allowing three hits and no walks. At home this season, he is 5-5 with a 3.59 ERA over 14 starts. In his only career start against the Giants, he took a no-decision while allowing one earned run over six innings.

Pirates reshuffle rotation

The Pirates enter the series with a different starting-pitcher plan than originally expected. Jared Jones' start was moved from the series finale on Sept. 3 to the opener of a series against the Los Angeles Angels on Sept. 4. Instead, Pittsburgh will use a bullpen game for the series finale, with Paul Skenes starting the opener and Bubba Chandler taking the mound for the second game.

The bullpen game comes after starter Mitch Keller was sidelined with a season-ending injury. Pittsburgh originally used Carmen Mlodzinski for three starts, but after struggles, the team opted for Lake Bachar. In the most recent bullpen game, the Pirates won 6-2, with six different pitchers contributing.

Skenes is looking to build on a strong outing after a difficult stretch. He had gone 3-9 with a 5.06 ERA over his prior 17 starts before the scoreless performance against San Diego, which was his first scoreless start in more than three months.

Chandler, in his first full season in the rotation, allowed one earned run over six innings against the Padres on Aug. 26 but took the loss in a 3-0 shutout.

The Giants will counter with three right-handed starters: Logan Webb in the opener, Landon Roupp in the second game, and Blake Tidwell in the finale.

Betting lines and trends

For Tuesday's game, the moneyline lists the Giants at +138 and the Pirates at -164, per FanDuel Sportsbook. The run line is Giants +1.5 (-178) and Pirates -1.5 (+146), with the over/under set at 7.5 runs (over +100, under -122).

The Giants are 12-10 against NL Central teams but have struggled on the road at 24-45. The Pirates are 11-16 against NL West clubs while going 34-32 at home.

As for trends, the over has hit in three of the Giants' past four games, while the Pirates' over cashed Sunday, halting a 10-game under streak.

One prediction in the betting preview projects a Giants 4-3 victory, citing Webb's solid numbers and Skenes' recent inconsistency as factors.