PHILADELPHIA -- Brewers right-hander Shaun Marcum will take a big step toward his return on Tuesday with a bullpen session at Citizens Bank Park.

Right elbow tightness forced Marcum to on the disabled list on June 23, retroactive June 15.

Marcum's bullpen session will likely determine how quickly the rest of his rehab goes. Manager Ron Roenicke said Marcum won't be back next week.

"Big day for Shaun tomorrow," Roenicke said. "That'll be good to see where he is. He's felt really good playing catch, and it'll be nice to get him back on the mound."

After extended layoff, Greinke back to mound

PHILADELPHIA -- After what manager Ron Roenicke deemed a "really good" bullpen session on Sunday, he's hopeful everything will be back to normal when Zack Greinke makes his first start in 11 days on Tuesday.

"In our discussions when he stops by and talks to me, whether it's in [batting practice] or my office or whatever, have been good," Roenicke said before Monday's series opener against the Phillies. "Lately, he feels good about trying to get back in his routine and with the bullpen [session Sunday]."

But with the July 31 non-waiver Trade Deadline looming, Roenicke knows things likely won't be completely back to normal for the righty. Greinke, who is set to be a free agent at season's end, has been the subject of trade rumors.

"I don't care who you are, you can't not listen to those things," Roenicke said. "When you're thinking about the possibility of maybe you're going to another team, it's not a real comfortable feeling.

"So I'm hoping mentally, because he prepares so well, I'm hoping he goes into this game like himself, where he's locked in to what he needs to do and he blocks out everything else."

Lucroy might rejoin Brewers on Thursday

PHILADELPHIA -- If all goes well, catcher Jonathan Lucroy could rejoin the Brewers when they return home to play the Nationals on Thursday.

Lucroy, who went on the 15-day disabled list May 28 with a fracture fifth metacarpal in his right hand, will continue his rehab assignment with games on Tuesday and Wednesday with Triple-A Nashville.

Before Monday's series opener against the Phillies, manager Ron Roenicke said he spoke to Lucroy and the catcher has "felt good in the four games he's played, but he hasn't felt great" regarding his timing at the plate. Lucroy is 4-for-12 with a double and two RBIs in his rehab assignment.

"I still told him that I want him, when he comes back, to feel that he is going to be productive when he steps in the batter's box," Roenicke said. "And as long as he feels like he's productive doing that, we can activate him."

Worth noting

• Corey Hart is the only Major Leaguer to start at least 40 games at first base without committing an error. That's made more impressive by the fact that, before this season, Hart played only two games at first base, and those starts came in 2006.

• Monday marked the first of seven games the Brewers and Phillies will play this season. They play a four-game set at Miller Park starting Aug. 16.