An exam Monday revealed no serious issues with Shaun Marcum's left hip, which forced him to leave after just one inning Friday in Boston.

The right-hander was evaluated by Dr. William Raasch and then participated in a light throwing session prior to the Brewers' game Monday against Tampa Bay at Miller Park.

"Medically, everything looks good," Roenicke said.

No decision has been made on whether or not Marcum will make his next scheduled start, which would be Wednesday against the Rays. The decision, Roenicke said, will be largely based on how Marcum says he's feeling.

"From the doctor's end, he's fine to go," Roenicke said. "If there is pain there, I think we're not going to start him."

Marcum reported no pain immediately following the session, which included about 25 pitches and lasted approximately a half-hour.

"The ball was coming out of my hand well," Marcum said. "I didn't really feel anything so I feel like it's only going to get better ... it can't get worse."

Roenicke likely won't decide until Tuesday, when Marcum is scheduled to work out again.

"We're going to go out and do ground balls and stuff like that and see how it responds," Marcum said.

If Marcum can't go Wednesday, Marco Estrada would likely get the nod. Estrada started four games for the Brewers earlier this season, filling in for Zack Greinke, and performed well, posting a 1-1 record with a 5.18 ERA. In 15 relief appearances, Estrada is 0-3 with a 4.43 ERA.

"If we need to use him tonight, we'd probably still go with him but we'd have to shorten the length of pitches he'd be able to throw," Roenicke said.

Marcum has been the most consistent member of the starting rotation, posting a 7-2 record and 2.85 ERA in 15 starts. Opponents are hitting just .215 against him and have struck out 84 times while drawing just 24 walks.

He was acquired last December in a trade with Toronto that sent top prospect Brett Lawrie to the Blue Jays.

"They didn't trade for me to sit here and watch baseball games," Marcum said. "They traded for me to go out and pitch so that's what I'm going to try to do."

All-Star update: Rickie Weeks closing the gap between he and Cincinnati second baseman Brandon Phillips in All-Star voting.

In the latest round of vote totals, announced Monday by MLB, Weeks closed within 191,876 of Phillips, who leads all second baseman with 2,286,378 votes.

Ryan Braun continues to lead all National League players with 3,034,057 and first baseman Prince Fielder remains third among NL first basemen (2,066,327), trailing Albert Pujols of the Cardinals and Joey Votto of the Reds.

The 82nd All-Star Game will be played Tuesday, July 12 at Chase Field in Phoenix.

Welcome back: After missing all of last season recovering from shoulder surgery, right-hander Mark DiFelice is back in the major leagues. The reliever was summoned Friday night from Class AAA Nashville, where he went 2-1 with a 2.17 ERA in 17 games, including three starts.

The 34-year-old made his major league debut in 2008, posting a 2.84 ERA in 15 outings (19 innings). In 2009, DiFelice established himself as a regular member of the Brewers' bullpen, appearing in 59 games and going 4-1 with a 3.66 ERA.

To make room for DiFelice on the roster, the Brewers designated Daniel Herrera for assignment. Herrera appeared in two games and allowed five runs (four earned) in 1 2/3 innings.

Going green: During the current homestand, the Brewers will launch their "Brewing a Greener Game" initiative, highlighting their increased efforts in eco-friendly practices.

The program gets underway Monday, when the Brewers Community Foundation presents a check to the Urban Ecology Center. An "eCycling" event is scheduled for Tuesday, when fans can drop off unused or unwanted computer equipment for recycling from 8 a.m. until noon.

Later in the week, the Brewers are teaming up for a "Bike to the Ballpark" event with the Friends of the Hank Aaron State Trail and the Menomonee Valley Partners. The first 500 participants will receive a commemorative water bottle and a voucher for two free tickets to a future Brewers game.

For a full list of "Brewing a Greener Game" activities and events, check out the official team news release.

Injury report: RHP Takashi Saito struck out two and allowed one hit in his second rehab outing Friday but is still complaining of soreness in his left oblique. He will undergo an MRI to determine the severity of the injury.

Quick hits: Prince Fielder homered Sunday, giving him 212 for his career and pulling him even with Geoff Jenkins for second place on the all-time franchise list ... Carlos Gomez has three hits in his previous 29 at-bats ... The Brewers lead the National League with 84 home runs ... Since taking over as closer May 23, 2010, John Axford has converted 43 of 48 save opportunities ... Milwaukee's 26-13 record since May 9 is the best in the National League and second-best in all of MLB.

This week: Interleague play continues for the Brewers, who host the streaking Tampa Bay Rays Monday-Wednesday at Miller Park. Thursday brings a much-needed day off and then it's another streaking team, the Twins, coming to Milwaukee for a weekend series at Miller Park.

NL Central standings (through games Sunday)