October baseball is bringing back a matchup San Diego would probably rather forget. The Cubs and Padres are set for a Wild Card Series rematch, one year after Chicago eliminated San Diego in a decisive Game 3 at Wrigley Field. This time the series shifts to Petco Park, where the Padres are the No. 4 seed off a 91-71 season and the Cubs arrive as the No. 5 seed at 89-73. First pitch for Game 1 is Tuesday night, and the two sides bring a genuinely nasty rivalry into this best-of-three.
A Regular Season Rivalry That Got Ugly Fast
These teams don’t just have playoff history, they have fresh regular-season scar tissue too. Chicago won five of six matchups against San Diego in 2026, outscoring the Padres by a staggering 55-28 margin across those games. The signature moment came on July 1 at Wrigley Field, when the Cubs put up 23 runs in a 23-3 win that stands as the worst loss in San Diego’s recent memory. San Diego’s lone win in the series came back in late April, and Chicago has owned every meeting since.
None of that guarantees anything changes in October, when a hot week of pitching can flip a series regardless of what happened in June. But it does put real pressure on San Diego’s pitching staff to prove the regular-season results were an aberration and not a preview. The Padres were genuinely good in 2026, finishing 91-71 with a 51-30 record at home, and Michael King emerged as a legitimate ace, going 12-10 with a 3.21 ERA across 32 starts. Bettors shopping a DraftKings Promo Code for the series should know King starts Game 1 looking to salvage some pride against the team that’s given his club fits all year.
The Matchups That Will Decide This Series
Chicago counters with Matthew Boyd, who quietly delivered a 10-5 record and 3.91 ERA in a season where the Cubs’ offense did most of the heavy lifting. That offense is the headline here. Chicago led all of MLB with 850 runs scored this season, a lineup capable of putting a game away in a single inning the way it did in that July blowout. Behind Boyd, the Cubs can turn to Kevin Gausman, Clay Holmes, or Shota Imanaga depending on how the series unfolds, giving Chicago’s manager real options if Game 1 doesn’t go their way.
San Diego’s path forward gets murkier beyond King. Nick Pivetta, who missed five months this year with a flexor strain, is the presumed Game 2 starter, and the Padres are still deciding between Robbie Ray and Walker Buehler for a possible Game 3. That’s a rotation with real questions attached to it, especially against a lineup that’s already feasted on San Diego pitching once this year. San Diego will counter with star power in the lineup, led by Fernando Tatis Jr., Manny Machado, and Xander Bogaerts, all capable of erasing a deficit with one swing.
The number to watch is the total. Both teams can score in bunches, and with two offenses this dangerous facing rotations that thin out fast, low-scoring pitchers’ duels seem unlikely across this series. Fans can track live lines throughout the round using the MLB odds page. Whichever bullpen holds up best over three games in a short turnaround window will probably decide who’s still playing by Thursday.
Prediction and Best Bet
San Diego has the better full-season resume and home-field advantage working in its favor, but Chicago has already proven, repeatedly, that it knows how to beat this specific opponent. Betting against a team that just dismantled you five times in six tries requires more evidence than a better overall record.
Other Game Picks
- Prediction: Cubs 6, Padres 4
- Best Bet: Cubs on the moneyline
Chicago’s offense, its recent dominance in this head-to-head, and last October’s series win over this same Padres team all point toward the Cubs stealing Game 1 on the road. Line shoppers can also compare a FanDuel Promo Code or a BetMGM Promotions offer before Tuesday’s first pitch.
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