It's July, the second half of the baseball season is upon us, and we're creeping up on the non-waiver trade deadline in the big leagues.

There has been a lot of speculation surrounding the Arizona Diamondbacks and whether they'll be buyers or sellers at the deadline.

Here at ArizonaSports.com, we'll keep you up to date on all the latest rumblings from Kevin Towers' office and the rumors involving the Diamondbacks from all over the Majors.

TUESDAY, JULY 31

Diamondbacks were grinding away at Matt Garza deal, came close, but didn't get it done.

— Buster Olney (@Buster_ESPN) July 31, 2012

The starting pitcher the Diamondbacks targeted was not Matt Garza -- it was Ryan Dempster.

— John Gambadoro (@Gambo620) July 31, 2012

Part of reason to target Dempster was to block the Dodgers from getting him. Dbacks are done no more trades!

— John Gambadoro (@Gambo620) July 31, 2012

Sources: # Dbacks Justin Upton will not be traded today.

— Codey Harrison (@ProspectsMLB) July 31, 2012

interested gm now convinced stephen drew staying with # dbacks

— Jon Heyman (@JonHeymanCBS) July 31, 2012

# Reds have been in talks with # Dbacks on Lyle Overbay.

— Jon Morosi (@jonmorosi) July 31, 2012

Getting Podsednick does not mean Dbacks are trading an outfielder - Podsednick will go to AAA Reno.

— John Gambadoro (@Gambo620) July 31, 2012

• Diamondbacks trade Craig Breslow to Red Sox (ArizonaSports.com)

The Arizona Diamondbacks traded lefthanded reliever Craig Breslow to the Boston Red Sox for two players.

Matt Garza deal to Diamondbacks will not include Upton if they can come to an agreement according to a source

— JIM BOWDEN (@JimBowdenESPNxm) July 31, 2012

Aces LHP Patrick Corbin scratched from his scheduled start today vs. Sacramento. He could be piece in deadline deal. # Dbacks

— Chris Gabel, RGJ.com (@RGJ_Aces) July 31, 2012

Dbacks have kicked the tires on Garza, Dempster, Johnson, Shields but are reluctant to move high end prospects and thats what it would take

— John Gambadoro (@Gambo620) July 31, 2012

Despite rumors I am hearing there is NO chance that a Justin Upton for Matt Garza swap will happen.

— John Gambadoro (@Gambo620) July 31, 2012

Diamondbacks working hard on something big, and a Garza/Upton framework makes sense for both Cubs and Diamondbacks.

— Buster Olney (@Buster_ESPN) July 31, 2012

Still 2 1/2 hours left but hearing there is almost no chance of anything big happening with the Diamondbacks at this point.

— John Gambadoro (@Gambo620) July 31, 2012

"The @ athletics want a SS…The price and the attitude are two things they're a little bit worried about." -@pgmamo on @ dbacks' Stephen Drew

— MLB Network (@MLBNetwork) July 31, 2012

# Diamondbacks execs meeting behind closed doors at hotel in LA. Reported earlier they want to get elite SP. Now they need to counter LA, SF.

— Ken Rosenthal (@Ken_Rosenthal) July 31, 2012

• SI's Verducci believes D-backs could make big deadline deal (ArizonaSports.com)

"I think the Diamondbacks serve as a stealth player [Tuesday], we haven't heard a lot from them, but the way they have played the last week or so they feel like they should go for it rather than fold," Verducci told ESPN's Mike & Mike on Arizona Sports 620.

• Sources: D-backs trying to land ace (FoxSports.com)

The Diamondbacks are trying to pull off a blockbuster for a premier starting pitcher, according to major league sources. The identity of the pitcher is not known.

MONDAY, JULY 30

D-Backs' talks of Stephen Drew to Oakland continue to have life. Could make sense for both sides.

— Buster Olney (@Buster_ESPN) July 30, 2012

• A's still looking at Drew & Yunel (CBSSports.com)

The A's are in the market for a shortstop, and their top two choices are still seen as Stephen Drew and Yunel Escobar.

TUESDAY, JULY 24

• Justin Upton won't be dealt in-season (ESPN.com)

It's officially time to put an end to Justin Upton trade talk. For now, at least.

The Tigers-Marlins trade does take the Diamondbacks out of discussions with Detroit involving Stephen Drew.

— John Gambadoro (@Gambo620) July 24, 2012

Source: Rays have interest in Dbacks' Ryan Roberts. Could handle 3B in Longoria absence, tho Keppinger has hit.

— Tim Brown (@TBrownYahoo) July 24, 2012

FRIDAY, JULY 20

• Kendrick: Nothing happening with Upton (FoxSportsArizona.com)

The Diamondbacks could trade Justin Upton today if they wanted. Their inaction has nothing to do with lack of interest from the market. It's the return that's lacking.

THURSDAY, JULY 19

• Drew drawing interest (Fox Sports)

It's still unclear whether the Diamondbacks will trade right fielder Justin Upton. But shortstop Stephen Drew appears to be generating enough attention to get moved.

WEDNESDAY, JULY 18

Amid Justin Upton talk, don't be surprised if #DBacks move a reliever, too. J.J. Putz allowed a .157 BA and .389 OPS in last 15 games.

— Jon Morosi (@jonmorosi) July 18, 2012

TUESDAY, JULY 17

It still appears the Pirates and the Diamondbacks don't match up on a Justin Upton trade. PIT has pitching, but Ariz. priority is SS help.

— Buster Olney (@Buster_ESPN) July 17, 2012

Arizona is among those interested in Chase Headley, but keep in mind: Padres and D-Backs have strained relations, complicating deal-making.

— Buster Olney (@Buster_ESPN) July 17, 2012

• So urces: Tigers interested in DBacks infielders (Fox Sports)

The Detroit Tigers have shown interest in Arizona Diamondbacks infielders Stephen Drew and Ryan Roberts, major-league sources told FOXSports.com.

• D-BACKS' UPTON: PART OF THE JAYS' PATTERN? (Fox Sports)

The Jays are one of the teams interested in Upton, sources say, and they're deep enough in prospects to pull off a blockbuster.

MONDAY, JULY 16

• Report: A's looking for a shortstop (CBS Sports)

The A's aren't involved in serious trade talks yet, but they're said to be eyeing Toronto's Yunel Escobar and Arizona's Stephen Drew.

• Upton's agent upset over trade rumors (USA Today)

Larry Reynolds, who represents outfielder Justin Upton, is tired of hearing negative comments that appear about his client. "I don't like the comments and innuendos made about Justin's work ethic and character," Reynolds said. " [He is] one of the hardest workers I know."

• Yankees are looking at the outfield market now (CBSSports.com)

They've talked to the Phillies about Shane Victorino and the Diamondbacks about Justin Upton, but Upton is a major long shot for them and right now they see the price tag as too high on either. Victorino may be slightly more realistic eventually, though.

• Upton can block trades to four teams (FoxSports.com)

Arizona Diamondbacks outfielder Justin Upton can block trades to four teams, major league sources told FOXSports.com: the New York Yankees, Boston Red Sox, Cleveland Indians and Chicago Cubs.

FRIDAY, JULY 13

• Short supply of Upton trade partners (Fox Sports Arizona)

Towers has clearly taken the "situation" beyond the rumor stage by talking openly about his willingness to listen to offers for the closest thing the Diamondbacks have to a superstar.

• Should the Rangers pursue Justin Upton? (ESPN Dallas)

Upton is intriguing because of his contract. He is signed through the 2015 season, meaning a club can get 3 1/2 seasons out of Upton. Buster Olney and Jim Bowden list the Texas Rangers as a possible trade partner for the Diamondbacks here. My concern is the cost of acquiring him may be too high (and I'm not trading Jurickson Profar, which we'll discuss in a moment).

• Could the Tigers trade for outfielder Justin Upton? Experts think so (Detroit Free Press)

Upton, a former No. 1 overall pick, is scuffling to say the least. He's hitting just .273 with seven home runs and 37 RBIs in 79 games. The good news? He's only 24, he just hit 31 home runs last season, has three seasons remaining on his current contract, could probably use a change of scenery and primarily plays right field, where Brennan Boesch is struggling mightily for the Tigers.

• Would the Mariners want to make a Justin Upton trade? I seriously doubt it (Seattle Times)

Upton is only 24 and even in a down year is outperforming every current full-time Mariners player at the plate, with the exception of Michael Saunders. Not only that, but he plays right field and would be the perfect replacement for Ichiro once the latter's contract expires later this year.