The Philadelphia Phillies have spent much of the season building one of the National League’s strongest rosters, but a troubling development involving Zack Wheeler has suddenly created uncertainty heading into the most important part of the schedule.
Philadelphia entered Tuesday’s game against the Seattle Mariners at 73-59, sitting just 3.5 games behind the Atlanta Braves in the NL East. The Phillies have already demonstrated that they can compete with the league’s best teams, but their championship aspirations could become much more complicated if Wheeler’s dramatic second-half decline continues.
Wheeler was virtually untouchable before the All-Star break. He entered the break with a 10-1 record and a spectacular 2.13 ERA, looking every bit like the dominant ace Philadelphia would rely on during the postseason.
Since then, however, everything has changed.
Across his first seven second-half starts, Wheeler has gone 0-4 with a 7.18 ERA. His latest outing against Seattle was especially concerning. He surrendered nine hits, five walks and four home runs while allowing eight earned runs in just over four innings. The eight earned runs matched the highest total of his career.
Perhaps the most frustrating part for Philadelphia is that Wheeler does not appear to be dealing with a significant physical problem. His velocity remains largely intact, and the veteran right-hander has insisted that he feels healthy and strong.
The bigger issue appears to be command.
Wheeler has struggled to consistently locate his pitches, giving opposing hitters more opportunities to punish mistakes. That is particularly dangerous for a Phillies team that has built much of its postseason identity around the strength of its starting rotation.
While the organization will certainly hope Wheeler can rediscover his form before October, Philadelphia cannot afford to simply sit back and wait for its ace to fix everything.
Three other starters now have an enormous responsibility.
Cristopher Sanchez Must Take Command of the Rotation
Cristopher Sanchez has already established himself as one of Philadelphia’s most reliable pitchers, but Wheeler’s struggles mean the left-hander may need to take his game to another level.
Sanchez has put together an outstanding season, entering this stretch with a 16-4 record, a 2.62 ERA, a 1.22 WHIP and 194 strikeouts over 168⅓ innings. Those numbers demonstrate that he is more than capable of carrying a rotation for extended stretches.
Before giving up four runs to the St. Louis Cardinals on Sunday, Sanchez had been particularly dominant. He had won six consecutive decisions and posted a 2.18 ERA across his previous seven starts.
That consistency is exactly what the Phillies need now.
If Wheeler’s command problems continue into September, Sanchez may need to become Philadelphia’s unquestioned Game 1 option in the postseason. He cannot simply be viewed as Wheeler’s supporting act anymore.
The Phillies need Sanchez to attack hitters aggressively, work deep into games and avoid putting unnecessary stress on the bullpen. Philadelphia’s middle relief options become far more important when its starters fail to reach the later innings, so Sanchez’s ability to consistently provide six or seven strong innings could become a major advantage.
The 29-year-old has already shown that he possesses ace-level ability. Now, Philadelphia needs him to embrace the responsibility that comes with being one of the team’s most dependable starters.
Jesus Luzardo Must Reestablish His Dominant Form
Jesus Luzardo is another pitcher who could determine how far Philadelphia goes in October.
Luzardo has produced an impressive season, entering Tuesday with an 11-5 record, a 3.35 ERA, a 1.15 WHIP and 194 strikeouts. His ability to generate swings and misses gives the Phillies another pitcher capable of controlling a game without needing constant defensive support or an offensive explosion.
His best stretch of the season came after June 10.
During a 12-start stretch entering his most recent outing, Luzardo posted a remarkable 1.98 ERA while recording 105 strikeouts, the most in the majors during that span. That version of Luzardo gives Philadelphia exactly what it needs behind Sanchez and Wheeler.
But there have also been warning signs.
Luzardo has occasionally been vulnerable to the long ball, and those mistakes become significantly more costly when Wheeler is struggling. A solo home run can be manageable, but multiple home runs in one inning can quickly change the direction of a game.
His recent performance against St. Louis, when he surrendered two homers, served as another reminder that Philadelphia needs greater consistency from him.
The Phillies do not necessarily need Luzardo to become a Cy Young candidate overnight. They simply need the dominant version of the left-hander who emerged during the middle portion of the season.
If Luzardo can maintain his strikeout ability, limit free passes and prevent isolated mistakes from turning into massive innings, he can provide Philadelphia with a second frontline starter capable of matching up with elite postseason offenses.
Aaron Nola Must Turn His August Resurgence Into a Breakthrough
Of the three pitchers, Aaron Nola may represent the biggest question mark and perhaps the biggest opportunity.
Nola has endured a difficult 2026 season. He entered this stretch with a 5-9 record, a 5.12 ERA and a 1.42 WHIP across 137 innings. Those numbers are far below the standard he has established throughout his Phillies career.
Yet something appears to have changed recently.
Over his last five starts, Nola has posted a much-improved 2.51 ERA while recording 34 strikeouts. His outing against the Miami Marlins was particularly encouraging, as he allowed only one run over seven innings while striking out eight and walking nobody.
That performance showed Philadelphia that the veteran right-hander may still have another gear.
The challenge now is proving that the improvement is sustainable.
Nola cannot afford to have one excellent month followed by another prolonged slump. The Phillies need him to carry the command and confidence he has displayed recently into September and, eventually, October.
His upcoming starts will provide important tests, particularly against stronger lineups. If Nola can continue limiting walks, generating swings and misses and keeping the ball in the yard, he could transform himself from a rotation concern into one of Philadelphia’s most valuable postseason weapons.
Phillies Cannot Wait Forever for Wheeler
There is still reason for optimism regarding Wheeler.
He has five or six starts remaining to correct his command, and the fact that his velocity remains strong while he insists he is healthy suggests that a turnaround is possible.
But Philadelphia cannot build its entire World Series strategy around the assumption that Wheeler will automatically return to his first-half form.
The Phillies have too much talent and too much at stake to leave themselves vulnerable if their ace continues struggling.
Sanchez needs to establish himself as the rotation’s dependable leader. Luzardo must rediscover the overpowering form that made him one of baseball’s toughest pitchers after June 10. Nola, meanwhile, has to prove that his August turnaround is real and capable of surviving against elite competition.
If those three pitchers can elevate their performances, the Phillies will have much more flexibility when the postseason arrives.
Philadelphia’s offense is talented enough to win games, and its bullpen has shown that it can protect leads when given the opportunity. But postseason baseball is often decided by starting pitching, and the Phillies cannot afford to enter October with too many unanswered questions in their rotation.
Wheeler still has time to fix the problem. However, the Phillies’ World Series hopes should not depend entirely on his recovery.
The best-case scenario for Philadelphia is obvious: Wheeler rediscovers his command while Sanchez, Luzardo and Nola continue pitching at a high level.
If that happens, the Phillies could enter October with one of the deepest rotations in the National League.
If Wheeler’s collapse continues, however, those three starters may be the players who determine whether Philadelphia’s championship dream survives.
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