Bobby Jenks (colonoscopy) is slated to throw a bullpen session Tuesday.

Jenks, who is currently on the disabled list with a back injury, was hospitalized over the weekend due to a stomach illness and underwent a colonoscopy earlier this week. He will need to throw three bullpen sessions and a simulated game before being cleared for a minor league rehab assignment. If all goes well, he could be back with the Red Sox by the end of the month.

Bobby Jenks (colonoscopy) was released from the hospital Tuesday.

Jenks was hospitalized over the weekend due to a stomach illness and underwent a colonoscopy on Tuesday. The Red Sox hope he will feel well enough to go to Fenway Park on Wednesday and do some throwing. He is currently on the disabled list with a back injury.

Bobby Jenks (back) is undergoing a colonoscopy Monday.

You know, just in case you were curious. Jenks was just beginning to make progress in his rehab from a back injury, so this will obviously set him back a few days. The veteran right-hander has been limited to just 19 appearances with Boston this season.

Bobby Jenks (back) is scheduled to throw a bullpen session Sunday.

Jenks is scheduled to travel to the team's complex in Fort Myers, Florida next week while the team is on the road in order to continue workouts. He is expected to throw in simulated games before joining Triple-A Pawtucket for a rehab assignment.

Bobby Jenks (back) had another "good day" of catch Thursday, according to Red Sox manager Terry Francona.

"He was a little sore after yesterday, but today was another good day and we'll see how he reacts tomorrow,'' Francona said. This is after a day after a session of catch was described as his "best day" but two days before he felt "just OK." Jenks will probably need a couple more "good" days before he can step on a mound.

Red Sox pitching coach Curt Young called Bobby Jenks' (back) Wednesday throwing session his "best day."

This, after manager Terry Francona said Jenks felt "great" on Monday and "just OK" on Tuesday. "[We're] trying to figure out if it was from maybe doing too much lifting or from the throwing," Francona said. "So we just are kind of going back and forth, probably not coming as quick as everyone would like, including himself. He had gotten that cortisone shot before we left, and he felt really good." The Sox will continue to monitor Jenks daily. There's no timetable for his return.

Bobby Jenks is already feeling improvement after receiving a cortisone injection in his back Thursday.

Good news, though it's not clear when he'll be ready to resume a throwing program. Jenks has been a major disappointment in the first season of a two-year, $12 million contract, posting a 6.32 ERA and 17/13 K/BB ratio over 15 2/3 innings. Fortunately Matt Albers has stepped up as a reliable option out of the bullpen, so the Red Sox aren't really missing him right now.

Red Sox placed RHP Bobby Jenks on the 15-day disabled list with left back tightness.

It's presumably the same issue that caused him to miss three weeks last month. There's no timetable for his return at this point, but you can bet the Red Sox will take it slowly with him. Jenks has been a disappointment when healthy, posting a 6.32 ERA and 2.23 WHIP while walking nearly a batter per inning over 19 games.

Bobby Jenks surrendered two runs on two hits and a walk while recording only one out against the Phillies on Thursday.

Jenks entered in the ninth inning staked to a 5-0 lead. Eleven pitches later, it was 5-2 with the tying run on deck, and Jenks was off to the clubhouse. After earning a 0.00 ERA and 0.50 WHIP in his first four innings of the season, he has accumulated an unbelievable 10.24 ERA and 3.83 WHIP in his 13 appearances since.

Red Sox activated RHP Bobby Jenks from the 15-day disabled list.

Jenks threw a scoreless rehab inning Saturday for Double-A Portland, showing enough in the one outing to convince the Red Sox brass that he is back to full health. The right-hander will return to a rough 6.57 ERA and 14/11 K/BB ratio. He's capable of putting together a strong second half.

Bobby Jenks (back) will be activated from the disabled list Tuesday.

Jenks threw a scoreless inning Saturday for Double-A Portland, and the Red Sox feel the one rehab appearance was enough. The rotund right-hander will return to a 6.57 ERA and 14/11 K/BB ratio in 15 games this season.

Bobby Jenks (back) began a minor league rehab assignment Saturday with Double-A Portland.

Jenks needed just 13 pitches to get through a scoreless frame. He gave up one hit and racked up one strikeout. The right-hander is expected to make two or three more outings in the minors before returning to Boston.

Bobby Jenks (back) will throw an extended bullpen session Wednesday.

Red Sox manager Terry Francona said Jenks has taken "rapid" steps in recent days. There's currently no timetable for his return, but it shouldn't be long. It's not clear if he'll need a rehab assignment or not.

Bobby Jenks (back) threw from 200 feet off flat ground Monday.

Red Sox manager Terry Francona called it his "best day by far," though there's no immediate timetable for his return. Jenks is currently on the disabled list for the second time this season. He has a 6.57 ERA and 14/11 K/BB ratio over just 15 appearances.

Bobby Jenks (back) is expected to require more than the minimum stay on the disabled list.

Red Sox manager Terry Francona said they will take a cautious approach with the reliever. "He assured us he won't do too much, and we don't want any setbacks with this," Francona said. "I think he's on board with that. He's getting pretty logical about it."

Red Sox placed RHP Bobby Jenks on the 15-day disabled list with a back injury.

Jenks underwent an MRI on Wednesday that apparently revealed more than just inflammation. The former White Sox closer has posted a 6.57 ERA in 12 1/3 innings this season as a setup man for Boston. It's not known how long he might be out.

Red Sox activated RHP Bobby Jenks from the 15-day disabled list.

Jenks had an ugly 9.35 ERA and 10/9 K/BB ratio over 8 2/3 innings before before going on the disabled list with a right biceps strain earlier this month, so he'll likely need to regain manager Terry Francona's trust before reclaiming a high-leverage role. He was hitting the mid-90s on the radar gun during his rehab assignment.

Bobby Jenks (biceps) will not be activated from the disabled list until Tuesday.

Jenks allowed one run in one inning Sunday during his final rehab appearance with Triple-A Pawtucket and has rejoined the big league club in Boston. He had an ugly 9.35 ERA and 10/9 K/BB ratio over 8 2/3 innings before before going on the disabled list with a right biceps strain earlier this month.

Bobby Jenks (biceps) allowed one run in an inning of work during his final rehab appearance for the Pawtucket Red Sox.

Jenks threw 20 pitches, 11 for strikes and hit 96 MPH on the radar gun. He appears on track to rejoin the big league club within the next day or two.

Bobby Jenks (biceps) will make rehab appearances with Triple-A Pawtucket on Friday and Sunday.

It's not clear if he'll be activated from the DL after that if things go well, but we're guessing that he will, as he's been pain-free and looked good in bullpen sessions. Jenks posted a 9.35 ERA and 10/9 K/BB ratio over 8 2/3 innings before his injury earlier this month.