Chicago Cubs vs San Francisco Giants Starting Lineup — Saturday, Jun 13, 2026

Chicago Cubs at San Francisco Giants (2026-06-13). Ben Brown vs Trevor McDonald at Oracle Park.

Ben Brown enters this contest with an impressive season ERA of 1.74 and a WHIP of 0.88 across 57 innings pitched in six starts, demonstrating elite control with a 9.16 K/9 and a low 2.53 BB/9. However, his recent outings reveal a pattern of short appearances, with his last five starts ranging from 2 to 3.1 innings, suggesting either a conservative approach from the Cubs or a recent inability to pitch deep into games. His trend ERA is flat, and he has yet to record a quality start this season, despite his strong overall numbers. Trevor McDonald, for the Giants, holds a season ERA of 4.15 and a WHIP of 1.18 over 39 innings through seven starts, with a K/9 of 8.54 and a BB/9 of 2.77. McDonald's recent form shows more variability, including a quality start percentage of 50 percent and a blow-up rate of 16.7 percent. His last five starts include a dominant seven-inning, one-run outing, but also a 3.2-inning, seven-run performance, indicating a pitcher capable of both strong and vulnerable performances. His ERA trend is currently listed as "down," suggesting recent improvement or a positive trajectory despite the occasional poor start.

The Cubs offense has generated 322 runs with a collective OPS of 0.723, supported by a 0.239 batting average and a solid 0.331 on-base percentage, alongside 80 home runs. Their plate discipline is evident with 299 walks. On the pitching side, Chicago's staff maintains a 4.26 ERA and a 1.25 WHIP, striking out 8.12 batters per nine innings, though they have allowed 102 home runs. The Giants offense, while scoring fewer runs at 289, boasts a slightly higher OPS of 0.725, driven by a 0.258 batting average and a 0.417 slugging percentage, with 71 home runs. Their on-base percentage is lower at 0.308, reflecting fewer walks compared to the Cubs. San Francisco's pitching staff carries a 4.58 ERA and a 1.41 WHIP, with an 8.01 K/9. Notably, they have surrendered fewer home runs, 72, compared to the Cubs' pitching staff.

Recent head-to-head matchups from the 2025 season show a significant advantage for the Giants, who won five of six contests against the Cubs. These games featured a mix of scores, including some high-scoring affairs such as 12-3 and 14-5, but also tighter contests like 4-3 and 5-2. The current total line for this game is set at 8.0. This line appears to reflect a cautious outlook, considering Ben Brown's excellent season ERA but also his recent pattern of short starts, which would expose the Cubs' bullpen earlier than usual. Trevor McDonald's ability to pitch deeper, coupled with his occasional struggles, could lead to variability. The historical head-to-head data, with its blend of high and low scoring outcomes, suggests that while the Giants have had success, the total line is a nuanced assessment of the current pitching matchup and team offensive capabilities.