San Francisco Giants vs Pittsburgh Pirates Prediction 5/9/26 MLB Picks Today

The Pittsburgh Pirates and the San Francisco Giants meet Saturday in MLB action from Oracle Park. We will look at this from a betting perspective and determine the best bets for this game. Here’s a Pittsburgh Pirates vs. San Francisco Giants prediction.

Starting Pitching Matchup

The Pittsburgh Pirates will send out Braxton Ashcraft here and Ashcraft is 1-2 with a 3.02 ERA and 45 strikeouts this season. This will be Ashcraft’s first career start against the Giants. Landen Roupp will start here for the Giants and is 5-2 with a 3.18 ERA and 43 strikeouts this season. This will be Roupp’s first career start against the Giants.

Pittsburgh Pirates Recap

The Pittsburgh Pirates come into this game looking to bounce back from their loss at the hands of the Giants by a final score of 5-2 to drop to 21-18 this season. After this series, the Pirates will head home for a series against the Rockies.

Pirates Have Two-Game Win Streak Snapped

Entering Friday, Oneil Cruz has 37 hits including 6 doubles, 9 home runs and 28 RBIs while Ryan O’Hearn has 38 hits with 5 doubles, 5 home runs and 25 RBIs this season. Nick Gonzales has 38 hits with 5 doubles and 17 RBIs while Brandon Lowe has 33 hits with 8 doubles, 10 home runs and 23 RBIs and Bryan Reynolds has 34 hits with 5 doubles, 2 triples, 4 home runs and 22 RBIs as well this season.

San Francisco Giants Recap

The San Francisco Giants come into this game looking to add on to their win over the Pirates on Friday to improve to 15-23 this season. After this series, the Giants will head on the road for a series against the Dodgers.

Giants Pick Up Rare Win

Going into Friday, Luis Arraez has 42 hits with 7 doubles, 2 triples and 11 RBIs while Willy Adames has 28 hits with 11 doubles, 3 home runs and 6 RBIs along with 47 strikeouts. Matt Chapman has 32 hits with 6 doubles, a triple, a home run and 12 RBIs and Jung Hoo Lee has 35 hits with 8 doubles and 12 RBIs. Heliot Ramos has 34 hits with 8 doubles, 3 home runs and 15 RBIs this season. Rafael Devers also has 31 hits with 6 doubles, 3 home runs and 15 RBIs but also has 45 strikeouts this season.

Pittsburgh Pirates @ San Francisco Giants Betting Trends: May 9, 2026

• Probable Starting Pitcher: Landen Roupp      Record this season: 5-2      ERA: 3.18
• Home Record: 2-1
• Last 5 against Pirates: –

Why the San Francisco Giants will win

• The Giants have won each of their last five games as underdogs against the Pirates following a win.
• The Pirates have lost four of their last five games as favorites against the Giants following a loss.
• The Giants have covered the run line in each of their last 12 games as underdogs against NL Central opponents.
• The Pirates have failed to cover the run line in seven of their last eight games as favorites against the Giants following a loss.
• The Giants have led after 5 innings in five of their last six night games at Oracle Park against NL Central opponents.

• Probable Starting Pitcher: Braxton Ashcraft      Record this season: 1-2      ERA: 3.02
• Road Record: 0-1
• Last 5 against Giants: 1-0

Why the Pittsburgh Pirates will win

• The Pirates have won each of their last six road games following a loss.
• The Giants have lost each of their last six Saturday night games.
• The Giants have failed to cover the run line in eight of their last nine home games against NL Central opponents following a home win.
• The Pirates have covered the run line each of their last six Saturday games against teams that held a losing record.
• The Pirates have led after 5 innings in 11 of their last 12 games as favorites against NL West opponents.
• The Pirates have led after 3 innings in each of their last five games as road favorites against NL West opponents.
• The Pirates have won the first inning in each of their last four games as road favorites against NL West opponents.

Total Runs Facts

• Each of the Giants’ last four games as underdogs against NL Central opponents have gone UNDER the total runs line.
• Each of the Pirates’ last four games after playing the previous day have gone UNDER the total runs line.
• The ‘Inning 1 UNDER 0.5 runs’ market has hit in each of the Pirates’ last nine Saturday night games.
• The ‘Inning 1 UNDER 0.5 runs’ market has hit in seven of the last eight games between the Pirates and Giants at Oracle Park.

San Francisco Giants Player Prop Facts

• Matt Chapman has hit a home run in three of his four previous appearances with his team as an underdog against the Pirates.
• Rafael Devers has recorded at least one hit in each of the Giants’ last eight games.
• Landen Roupp ranks T3rd in the league for Wins (5) this season.

Pittsburgh Pirates Player Prop Facts

• Bryan Reynolds has hit a home run in each of the Pirates’ last two games as favorites against the Giants.
• Marcell Ozuna has recorded at least one hit in each of his last 10 Saturday night appearances against NL teams that held a losing record.
• Oneil Cruz ranks T3rd in the league in Steals (13) this season.

Matchup/League Facts

• The Giants rank 30th in the league for runs scored this season (120).
• The Giants rank 30th in the league for RBIs this season (115).
• The Pirates rank 2nd in the league for home runs allowed this season (30).
• The Pirates rank T27th in the league for doubles this season (51).

Pittsburgh Pirates vs. San Francisco Giants Prediction

I’m on the under in this one. I think this is just a low-scoring game with a great pitching matchup in Roupp vs. Ashcraft and two teams that I’m having troubles trusting offensively right now. This feels like a 3-2 kind of game so give me the under here.