The Chicago Cubs got some bad news regarding starter Yu Darvish.

Cubs' president of baseball operations Theo Epstein said Tuesday that Darvish will need at least six weeks to recover from a stress reaction in his right elbow, meaning he will miss the rest of the regular season. 

"Hopefully it turns out well to get him back next year from Day 1," manager Joe Maddon said. "It's been a very difficult year, obviously, for him to have to endure the physical and maybe some of the emotional, mental pain."

The news comes on the heels of Darvish removing himself from a rehab start on Sunday after just one inning.

Despite the bad news, Epstein adds that the MRI showed Darvish has healed from what caused him to miss all of 2015 due to Tommy John surgery.

“I should note there was some good news with the testing. His ligament that was reconstructed [Tommy John] looked really good and in place and stable,” Epstein said.

Since signing with the Cubs in the off-season on a six-year, $126 million deal, Darvish has struggled in eight starts before going on the disabled list. He will end 2018 with a record of 1-3 and an ERA of 4.95.

He has not pitched since beating the Cincinnati Reds on May 20. 

The Cubs enter play Tuesday at 71-52, three games up on the Milwaukee Brewers in the Central Division.