John Danks resting shoulder strain

Chicago White Sox pitcher John Danks is tentatively scheduled to begin another rehabilitation assignment in the next three to four weeks after MRIs revealed a mild Grade 1 strain in his left shoulder.

The MRIs, conducted Monday at Midwest Orthopedics at Rush University Medical Center, showed the strain of the subscapularis muscle in the shoulder. The strain has shown improvement from the previous MRI conducted on May 23.

There was no tendon or ligament damage, and his labrum is intact, according to an update released by the team Tuesday.

"It's definitely good to have some answers and know for sure what we're dealing with," Danks said on Tuesday. "Formulating a plan now to try to get back as soon as possible. I guess it is good news, but I wish we had progressed a little further by this point. I kind of expected to be back at this point. I just have to listen to my body and do what it says."

The injury will not require surgery.

"That was my first question (about surgery)," Danks said after Monday's 12-3 loss to the Chicago Cubs. "When you hear 'tear,' it's kind of scary. I don't think it's anything super major. Like I said, I went out there and pitched earlier last week and felt fine, stuff was great, just having trouble bouncing back. This is the reason.

Danks will rest Tuesday and Wednesday before beginning a rehabilitation and strengthening program on Friday under the supervision of trainer Herm Schneider.

"We're still trying to plan kind of a plan," Danks said. "I don't know if they're going to have me go play catch next week or a couple weeks or tomorrow. I haven't heard a thing."

"There's enough down time you have to start looking at silver lining. In a perfect world, none of this would have happened, I would have been having a good year, and we'd still be in first. It is what it is. Hopefully, I do come back and I can be the guy to help anchor the staff when these guys start running out of gas. The four other guys certainly picked me up before I got hurt. I'd like to contribute in a positive way this year."

Danks went on the 15-day disabled list retroactive to May 20 after feeling an abnormal soreness in the back of his left throwing shoulder after a start on May 19. He made a rehab start for the Triple-A Charlotte Knights on June 12, allowing one earned run in four innings, and felt soreness again.

Danks has a 3-4 record with a 5.70 ERA for the White Sox this season. Rookie Jose Quintana has replaced him in the rotation and is 2-1 with a 1.53 ERA in 35 1/3 innings.

Danks received a five-year, $65 million contract extension in the offseason. He'll make $8 million this season and $14.25 million from 2013 to '16.

ESPNChicago.com's Scott Powers contributed to this report.