Chicago Cubs (48-55): RF Nate Schierholtz, SP Jeff Samardzija, RP Kevin Gregg, RP James Russell
The Cubs have already dealt Matt Garza, Alfonso Soriano, Scott Feldman, Carlos Marmol and Scott Hairston this year, and they likely aren't done. Scrapheap resurrection Gregg and right fielder Schierholtz are the most likely remaining players to be moved, but the Cubs would consider moving ace Jeff Samardzija if the price is right, according to a tweet from Ken Rosenthal of Fox Sports.
Colorado Rockies (51-55): RF Michael Cuddyer, RP Rafael Betancourt, RP Matt Belisle
It may be a bit unfair to call the Rockies non-contenders at this point, but they're on the fringe of contention at best, six games back in the NL West and eight back in the wild-card race. They'll likely opt to neither sell nor buy at the deadline, though they do have some pieces to move if they do sell. It would take a lot to pry All-Star Cuddyer away, but Betancourt and Belisle could likely be had and are both reliable veteran relievers.
Miami Marlins (40-63): IF Placido Polanco, IF Greg Dobbs, OF Juan Pierre, CF Justin Ruggiano, RP Ryan Webb, RP Chad Qualls
According to a report from Joe Frisaro of MLB.com, the Marlins are likely to hold on to RF Giancarlo Stanton, 1B Logan Morrison, RP Mike Dunn and RP Steve Cishek, as they are viewed as building blocks for the future. That doesn't leave much of value, but center fielder Ruggiano brings a good mix of power and speed, and a handful of low-cost veteran pieces could help fill out a contender's roster.
Milwaukee Brewers (43-61): RF Norichika Aoki, SP Yovani Gallardo, SP Kyle Lohse, RP John Axford, RP Mike Gonzalez
Aside from the breakout performances of SS Jean Segura and CF Carlos Gomez, it's been a rough season in Milwaukee so far. The Brewers have already dealt reliever Francisco Rodriguez, and they could look to deal more before the deadline passes. The asking price for Gallardo in relation to how he's pitched this season will likely keep him in Milwaukee, but they could move the veteran Lohse and a few other relievers.
New York Mets (46-56): OF Marlon Byrd, RP Bobby Parnell, RP LaTroy Hawkins
Despite the fact that they're out of contention, the Mets reportedly won't look to move Byrd or Parnell at the deadline, according to Andy Martino of the New York Daily News. However, if someone makes an overwhelming offer, they likely wouldn't turn it down. Byrd in particular seems like a prime candidate to be traded, seeing as he was signed to a minor league deal in the offseason and is a free agent at the end of the year, but he's been their best power hitter, and they want to remain competitive.
Philadelphia Phillies (49-56): C Carlos Ruiz, 2B Chase Utley, 3B Michael Young, RP Jonathan Papelbon
The Phillies seem likely to deal the veteran Young, with a number of teams in the market for a third baseman and veteran bat, and the team could look to move a handful of other veteran pieces as well. Utley is also a free agent at the end of the season, but the team could opt to keep him and look to re-sign him to a less expensive deal to finish out his career in Philly. Moving Papelbon's contract may be tricky, but they'll likely try to do that as well.
San Diego Padres (48-58): C Nick Hundley, LF Carlos Quentin, OF Chris Denorfia, SP Edinson Volquez, RP Luke Gregerson, RP Joe Thatcher
The Padres have played better than expected at times this season, but they're in a position to sell nonetheless. Top setup man Gregerson is the most likely to be dealt and should net a solid return, but there are a handful of other second-tier players who could be shopped. Quentin has a no-trade clause and won't come cheap, as he's under contract for two more years.
San Francisco Giants (46-58): RF Hunter Pence, SP Tim Lincecum, RP Javier Lopez
The reigning champions have fallen off badly over the last month, and while the likely scenario is that they just stand pat at the deadline, they do have a few pieces they could shop. Chances are they'll look to re-sign Pence at the end of the season, so holding on to him seems likely. Lincecum has been up and down once again, while left-hander Lopez is one of the better southpaws out there.
Washington Nationals (52-54): RP Tyler Clippard, RP Drew Storen
The Nationals may very well wind up buying at the deadline, with a starting pitcher their most likely target, but at 8.5 games out in the NL East and seven back in the wild-card race, they fit the bill of non-contender. If they were to wind up selling, it wouldn't be much, but they do have some bullpen pieces to deal.