Chicago Cubs starting pitcher Marcus Stroman. Matt Blewett-USA TODAY Sports

Chicago Cubs pitcher Marcus Stroman has not pitched since July 31 due to an injury that was not initially thought to be serious. On Wednesday, however, the Cubs admitted that things are worse than they initially appeared.

Stroman is dealing with a right rib cartilage fracture, the Cubs announced Wednesday. The team had no timetable for his return.

Stroman was originally placed on the IL with right hip inflammation on Aug. 1, but was expected to miss only one start. However, he experienced more pain during a bullpen session on Sunday, prompting the team to shut him down again and send him for further tests instead of bringing him back on Wednesday as they initially hoped.

If Stroman is gone for any extended period of time, the Cubs’ playoff hopes will suffer. He was an All-Star this season and had a 3.85 ERA when he went on the IL. He was viewed as a trade candidate before the Aug. 1 deadline until the Cubs got hot and abruptly changed course.

The Cubs are 3.5 games out of first in the NL Central and one game back of the final NL wild-card spot entering play Wednesday.

More must-reads:

TODAY'S BEST
Pacers ride historic shooting performance to Game 7 blowout of Knicks
Timberwolves mount incredible second-half comeback to stun Nuggets in Game 7
Xander Schauffele proves doubters wrong with historic win at 2024 PGA Championship
Four things we learned from Joey Logano's All-Star Race win at North Wilkesboro
Phil Foden lifts Manchester City to fourth consecutive English Premier League title
Watch: Aaron Judge blasts 13th home run in Yankees' seventh straight win
Canucks won't have linchpin forward for Game 7 vs. Oilers
Jags reportedly mulling extension for Trevor Lawrence, but is that the right choice?
Gordon Hayward calls role with Thunder 'frustrating'
Mets reliever Edwin Diaz showing short shelf life of closers
Three offseason moves the 49ers must make
Watch: NASCAR drivers exchange punches after crash in All-Star Race
Knicks star offers passionate defense of HC Tom Thibodeau after Game 7 loss
Knicks' Jalen Brunson suffers serious injury in Game 7 vs. Pacers
Dodgers add recently acquired left-hander to active roster
Report: 2023 No. 7 pick expected to terminate KHL contract, join Flyers
Mavericks advance to Western Conference Finals aided by controversial call late
Connor McDavid, Oilers hammer Canucks to force Game 7
Tyson Fury-Oleksandr Usyk epic increases excitement for potential rematch
Seize the Grey wins in muddy Preakness