"Everything felt great today," Jenks said following a 25-pitch session on Monday afternoon. "[My] biceps is back to where it was before a few weeks ago. Right now, everything's looking good."
Jenks will throw another side session on Wednesday and thinks he might be ready to be activated during Boston's four-game series in Detroit this weekend.
"The way it went today, as far as health-wise, we're right on schedule to be back this week, hopefully in Detroit," Jenks said.
The righty doesn't think he needs a rehab outing in the Minors.
"Once I'm right, I'll be able to get back out there," said Jenks. "It's just a matter of getting my feet back under me. Another bullpen [session] or two, it will take care of that right away."
While he was in the midst of a bad slump before the injury, Jenks is clearly itching to get back on the mound and help his team.
"It's been way to long," Jenks said. "I need to get back out there. I've been going crazy in the dugout."
Starter John Lackey, who is on the DL with a right elbow strain, will throw his first side session on Tuesday.
"It seems like he's doing really well," said manager Terry Francona.