Sean Marshall (shoulder) threw 25 pitches to hitters Friday.

"I felt really good," said Marshall. I threw all my pitches." The southpaw has been sidelined since late May with a sprained left shoulder, but appears on the verge of beginning a minor league rehab assignment.

Sean Marshall (shoulder) threw his latest bullpen session Tuesday.

Marshall threw 42 pitches at maximum effort while coaches stood in at the plate to simulate batters. "It went great," said Marshall. "I used all of my pitches -- backdoor sliders, curveballs -- mixing pitches like it would be in a game. I'm not sore today." Marshall has been out since late May due to a sprained left shoulder, but he has been throwing for nearly two weeks now. It's not clear when he'll go out on a minor league rehab assignment, but it sounds like he's getting close.

Sean Marshall (shoulder) threw a bullpen session Saturday.

It was a 20-pitch mound workout at less than full speed. Marshall has been on the disabled list since May 21 with a shoulder sprain and is easing his way into throwing. "We're trying to get him back to 100 percent then activate him," Reds pitching coach Bryan Price told reporters Saturday. "That's going to be a little while yet."

Sean Marshall (shoulder) felt good Tuesday after pitching off flat ground.

"I jammed it out yesterday, 35 pitches," said Marshall, who has been sidelined since May 20 with a lingering shoulder issue. "It felt good. Usually when I take a day off, I get a little bit out of sync but yesterday was good and today should be great." Marshall thinks he could throw a light bullpen session at some point this weekend. The southpaw could return in the early part of July if he can avoid setbacks.

Sean Marshall (shoulder) is long-tossing at 120 feet.

"He threw very well today," Reds trainer Paul Lessard told reporters on Wednesday evening. Marshall is expected to return from the disabled list around early July.

Sean Marshall (shoulder) hopes to begin long-tossing in the next day or so.

Marshall's shoulder is feeling good so far, but the left-hander thinks he's probably still at least three weeks away from a return. He's been out since mid-May with a shoulder issue that initially cropped up in spring training.

Sean Marshall (shoulder) has resumed a throwing program.

Marshall has been shut down since May 21, but is reportedly "pain-free" and expects to ramp up his throwing activities this week. While it's a step in the right direction, there's still no timetable for his return. The Reds are hoping that he'll rejoin their bullpen before the All-Star break.

FOX Sports' Ken Rosenthal reports that Sean Marshall (shoulder) is expected to be out for close to another month.

Marshall has on the DL since May 21 with a sprained left shoulder. The Reds are hoping he can return sometime around the All-Star break.

Reds placed LHP Sean Marshall on the 15-day disabled list, retroactive to May 21, with a sprained left shoulder.

It's the second time this season that the shoulder has sent him to the DL, though the Reds called it tendinitis the first time around. The club figures to take it slowly with Marshall this time, so he could be looking at an extended absence. Manny Parra (pectoral) has been activated and will take Marshall's spot in the bullpen.

Sean Marshall was not available out of the Reds' bullpen on Wednesday due to a "cranky" left shoulder.

The Reds don't seem concerned. "We're erring on the side of caution," Marshall said. "I told them I was little sore. We have some very capable arms come out of the bullpen a time or two season so far. ... I needed this extra day of rest. I'll be back to the way I've been feeling."

Reds activated LHP Sean Marshall from the 15-day disabled list.

Marshall gave up two hits and struck out four in two innings over his two rehab appearances with Triple-A Louisville. After giving his shoulder a rest, the Reds are hoping he'll be an impact arm in the late innings once again.

Sean Marshall (shoulder) will make another rehab appearance with Triple-A Louisville on Wednesday.

Marshall struck out two in a perfect inning for Louisville on Monday. Reds manager Dusty Baker indicated that the lefty would need to appear in back-to-back games before being activated, though it's not clear if that's definitely the plan.

Reds manager Dusty Baker indicated that Sean Marshall (shoulder) will need a few more rehab appearances.

Marshall struck out two in a perfect inning for Triple-A Louisville on Monday. He's eligible to be activated on Tuesday, but Baker thinks the lefty could use a couple more appearances. "There could be some more [rehab games]," Baker said. "Usually one is not enough. You've got to do a day in between, then usually a back-to-back. We'll see how he comes out of this."

Sean Marshall (shoulder) is scheduled to make a rehab appearance Monday night at Triple-A Louisville.

Marshall is eligible to return from the disabled list on Tuesday and will be activated as long as he doesn't wake up with unexpected discomfort. The left-hander has been out since April 8 with shoulder tendinitis.

Sean Marshall (shoulder) threw his second bullpen session on Saturday since being placed on the disabled list.

Marshall didn't report any setbacks and is close to being cleared for a rehab assignment. The Reds are hoping he'll be ready to return from the DL when first eligible Tuesday against the Cubs.

Sean Marshall (shoulder) is expected to return from the 15-day disabled list on Tuesday, April 23.

That's the first day he will be eligible for activation. Marshall was placed on the disabled list April 10, retroactive to April 8, with left shoulder tendinitis. He has been throwing long toss this week with ease.

Reds placed LHP Sean Marshall on the 15-day disabled list, retroactive to April 8, with left shoulder tendinitis.

Marshall has been dealing with shoulder fatigue since the end of spring training and will now get a couple of weeks off to build his arm strength. Logan Ondrusek was recalled from Double-A Pensacola to take his place on the roster.

Reds manager Dusty Baker admitted Tuesday that he's "still a little worried" about Sean Marshall (shoulder).

"He's not right," Baker added. Marshall dealt with left shoulder fatigue towards the end of spring training and has appeared in just one game so far during the regular season. It sounds like a trip to the disabled list will probably be needed. The Reds have good depth in their bullpen, but losing Marshall for an extended period of time would hurt.

Sean Marshall has been unavailable the past two games because of minor left shoulder fatigue.

Marshall is optimistic that he'll be ready to rock by Friday. The lefty boasts a 2.47 ERA, 1.12 WHIP and 10.3 K/9 in 231 appearances since the start of the 2010 season. He is serving as Aroldis Chapman's setup man this year.

Sean Marshall was pulled from a save opportunity Saturday against the Yankees.

Marshall entered the bottom of the ninth inning with a three-run cushion, but he allowed two runs on four hits before getting pulled in favor of Jose Arredondo. Arredondo then got Derek Jeter to hit into a fielder's choice and Curtis Granderson on a ground out to first base to end it. Marshall has only blown one save in eight tries this year and has a solid 21/3 K K/BB ratio, but he owns an ugly 5.02 ERA over 14 1/3 innings. If the Reds truly have no intention of putting Aroldis Chapman in the rotation this year, the hard-throwing left-hander could eventually threaten for the closer job.