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7/7/2014 8:40 P.M. ET

Sizemore's future with Phillies remains uncertain

MILWAUKEE -- Triple-A outfielder Grady Sizemore can opt out of his contract over the All-Star break if he is not in the Phillies' big-league plans.

Is he close to joining the Phillies?

"If he's playing like he is right now, that's what it looks like," general manager Ruben Amaro Jr. said when asked if he anticipated Sizemore joining the team at some point. "We'll see. We're considering it."

Sizemore entered Monday hitting .303 (10-for-33) with one home run, one RBI and a .772 OPS in seven games with the IronPigs.

"He's playing pretty good, moving pretty well," Amaro said. "We have some time to make the decision on him, but everything so far has been positive."

Triple-A right-hander Jason Marquis, who is rehabbing from Tommy John surgery, has pitched well with the IronPigs. He can opt out of his contract on July 31.

Amaro says changes are coming to struggling offense

MILWAUKEE -- Ruben Amaro Jr. said Monday that changes are coming for the Phillies' offense.

It could come in the form of trades before the July 31 non-waiver Trade Deadline, injured players finally getting healthy or Minor Leaguers finally getting a shot.

"It's disappointing, particularly the offense," Amaro said about the Phillies' performance. "What more can you say other than we're not swinging the bats very well? I didn't anticipate our guys being this poor. Because they are. They are this poor. We think that they're better. But they haven't shown it. So at some point we're going to have to make some changes. Some guys, once they are ready to play, may be factors for us."

The Phillies hit just .206 and averaged just 2.56 runs a game over their recent 3-13 slide. They hit .148 with runners in scoring position in that stretch. For the season, the Phillies are 26th in baseball in runs per game (3.75) and 29th in OPS (.661), despite having a franchise-record $180 million payroll and nearly every high-paid hitter healthy.

Possible changes include Triple-A outfielders Darin Ruf and Grady Sizemore and infielders Maikel Franco and Freddy Galvis.

"Whoever else in the organization may be factors for us," Amaro said. "We have to get them healthy and see if it behooves us to make any of those changes."

Ruf is recovering from a knee and wrist injury, Sizemore can opt out of his contract over the All-Star break if he is not in the Phillies' plans, Galvis is recovering from a broken collarbone and Franco is trying to get on track after struggling most of the season.

Franco, who was the organization's top hitting prospect entering the season, is hitting .342 (13-for-38) with two doubles, one triple, one home run and eight RBIs in the past nine games.

"He's swinging the bat well," Amaro said. "Hey, listen, I'm looking for people who can swing the bat. Because we're not doing it here. If he gets to the point where he starts swinging the bat consistently, he's a guy who could be in play too."

But Franco plays third base and Phillies third baseman Cody Asche warrants a longer look. Could both be on the field at the same time?

"Yeah, because he could play first base, too," Amaro said about Franco.

Phillies first baseman Ryan Howard is hitting .230 with 14 home runs, 51 RBIs and a .701 OPS entering Monday, which ranks 114th out of 165 qualifying hitters in baseball.

Amaro said there is still interest in his players, despite their poor play recently. He also said the front office has been active in pursuing improvements.

"Whether we'll actually get it done or if there is something that can improve us, it depends on how our club is being evaluated," Amaro said. "If we're going to make changes, we make changes to get better. Everything we think about is thinking about how we can improve our club. Will we be better? That's what you have to analyze."

Lee not expected back until after All-Star break

MILWAUKEE -- A rain-shortened rehab start Sunday means Cliff Lee will not rejoin the Phillies' rotation until after the All-Star break.

Lee is scheduled to make a second rehab start Wednesday with Class A Clearwater after being limited to just 24 pitches in two innings Sunday. The Phillies planned to have Lee throw Sunday before deciding whether he could rejoin the rotation.

That won't happen now until after the break.

"We'll wait two days and he'll throw 60-65 pitches for Clearwater on Wednesday and then if he gets through that, we'll go to the next step which is probably one more rehab -- I hope -- and then hopefully ready to go," Phillies general manager Ruben Amaro Jr. said.

Lee, who has been on the disabled list since May 19 with a strained left elbow, is 4-4 with a 3.18 ERA in 10 starts this season. Whenever he rejoins the Phillies, he will be pitching for scouts from contending teams who will want to see if he is healthy enough to help them down the stretch.

"We'll so how it feels after Wednesday," Amaro said. "He felt fine. No issues. No pain. No issues with the elbow so that's a good sign. Stuff was good. Delivery was good. He was 89-91 mph, so not all that far off from where he usually is."

Catcher Carlos Ruiz, who has been on the seven-day concussion disabled list since June 27, had another impact concussion test Monday. Amaro said Ruiz has improved, and another test is scheduled for Wednesday.

Ruiz could be cleared for baseball activities as early as this weekend, and he could rejoin the team in the middle of the month at the earliest.

Todd Zolecki is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.