Aaron Sanchez, who is out of the MLB lineup with a strained right oblique, is scheduled to undergo surgery Thursday to repair the tear, the Cubs announced.
Sanchez, 32, suffered the injury in a Sept. 16 win over the Texas Rangers.
He’s expected to miss two weeks, the club said in a statement.
Shelby Miller, the MLB’s vice president of baseball operations, said the team was “shocked and saddened” by the injury and that Sanchez will undergo surgery “in the coming days.”
Sanchez was a five-time All-Star, earning three Cy Young Awards, one Silver Slugger Award and three Gold Gloves.
He was a two-time Gold Glove winner, with the first two coming in 2001 and 2002.
The Cubs are the only team in baseball that has a starting pitcher on the disabled list and a starting catcher on the 15-day disabled list.
Snyder, 31, had Tommy John surgery in July and missed nearly two months after having his right elbow ligament removed in October.
He returned to the Cubs for his final regular-season game in September and finished the season with a 1.78 ERA in 12 starts.
He struck out 32 batters in 33 innings.
Spencer Plummer, 30, had surgery on the right elbow and missed most of the regular season after breaking his left collarbone in late September.
He had a 2.60 ERA in seven starts and finished third in Cy Young voting.