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7/9/2013 12:35 A.M. ET

Walker remains out of lineup but avoids MRI exam

PITTSBURGH -- Pirates second baseman Neil Walker received treatment Monday afternoon after exiting Saturday's game against the Cubs with discomfort in his right side.

Walker said Sunday he had an MRI exam scheduled for Monday, but a team spokesman later said he did not need one.

Walker got a "heat and treat," and manager Clint Hurdle said he wanted to get the 27-year-old out on the field before Monday's game to "do some things with the bat." Brandon Inge started at second base Monday against the Athletics.

Hurdle does not like to think hypothetically, he said, so he did not indicate any kind of plan moving forward if Walker were to land on the disabled list.

Inge can play second, and Josh Harrison, who has had three different stints with the Bucs this season, has played mostly second base for Triple-A Indianapolis. Jordy Mercer played there when Walker dislocated his finger in early May, and he has since taken over for Clint Barmes as the full-time shortstop.

"I think we're way in front of ourselves; I'll deal with it one day at a time," Hurdle said. "The answer today might not be the answer tomorrow."

Walker has a .244/.347/.384 slash line this season, playing in 72 games. He has six home runs and 26 RBIs.

Bucs' Alvarez must wait to show Derby power

PITTSBURGH -- Pirates manager Clint Hurdle has watched a power hitter grow up this season. But he will not get to showcase that power in New York next week, at least not next Monday.

Pedro Alvarez said it would be "pretty neat" to be selected for the 2013 Chevrolet Home Run Derby, but he was not chosen by National League captain David Wright. Rockies outfielders Carlos Gonzalez and Michael Cuddyer, Nationals outfielder Bryce Harper and Wright will participate for the NL. Alvarez hit 22 home runs heading into Monday, the third most in the NL.

Hurdle said he was fine with Alvarez's potential participation but that there was a certain way to approach the Derby.

"I've seen some guys come out of that thing gassed," Hurdle said. "Whether it was a coincidence or not, the follow-up for a few weeks was a whole different thing than what you saw going in."

Andrew McCutchen participated last year, exiting in the first round after hitting four homers.

Locke unable to pitch in All-Star Game

PITTSBURGH -- Jeff Locke, one of baseball's most unlikely All-Star selections, will not be able to take the field in the Midsummer Classic next week.

Locke started Monday against the Athletics and will start again Sunday against the Mets, meaning he will not be available for the All-Star Game two days later.

Pirates manager Clint Hurdle will keep the rotation the same heading into the break. Charlie Morton will start Friday, and A.J. Burnett will throw Saturday.

"I would prioritize our need over their need," Hurdle said. "I think this is a good move. You should not take away from your seasonal objective."

Bartolo Colon, Oakland's All-Star who started against Locke on Monday, is in the same boat, as his next start is Sunday as well.

Worth noting

• The Pirates have signed seventh-round Draft pick Buddy Borden, a righty out of UNLV. He went 8-2 with a 2.59 ERA this season and was named Co-Mountain West Pitcher of the Year. He will be assigned to short-season Class A Jamestown. The Pirates have now signed 27 Draft picks.

• Locke lost his first game since April 7 on Monday, allowing just two runs and three hits over seven innings. Last week, he became the first pitcher in franchise history to avoid losses in 16 straight starts.

• The A's are now 10-0 all-time against the Pirates. This is just their second trip to Pittsburgh. The Pirates are 11-4 in Interleague Play.

First number, last word

22 -- Alvarez is the fifth Pirate to hit at least 22 home runs before the All-Star break. The others are Willie Stargell, Ralph Kiner, Frank Thomas and Brian Giles.

"I did see the movie. I've got some buddies that were portrayed in the movie that weren't real happy with the movie. Far be it for Hollywood to put out a good movie and move some things around." -- Hurdle on "Moneyball," the film that chronicled the Athletics' 2002 season.

Steven Petrella is an associate reporter for MLB.com This story was not subject to the approval of Major League Baseball or its clubs.