Every MLB team's biggest need at the 2016 trade deadline

Arizona's all-in effort was probably derailed when A.J. Pollock went down just before opening day, but the team still has a strong, young offensive core. As for pitching, Zack Greinke (pictured) started to come around before suffering an oblique injury, but Shelby Miller has been a disaster and Rubby De La Rosa's future is clouded by an elbow injury. The team sees potential in Robbie Ray, Archie Bradley, and a few interesting upper minors prospects like Braden Shipley and Anthony Banda, but Arizona needs more to compete next year.

Atlanta has several elite prospects nearly ready for the majors, but the team clearly lacks outfield talent. Hector Olivera has been a disaster on and off the field, and Nick Markakis' contract is looking worse by the day. The Braves are easily last in runs scored in all of baseball and have no real high-end outfielders on the horizon aside from injured center fielder Mallex Smith (pictured).

The O's somehow remain in the AL East race despite the third worst rotation ERA in baseball. Chris Tillman (pictured) and Kevin Gausman have been adequate, but the rest of the team's rotation has been atrocious. Even if the Orioles do make the playoffs, it seems unlikely that they will progress far with their current rotation.

The Red Sox came into the season hoping Cuban outfielder Rusney Castillo would realize his potential, but he's been even more disappointing than last season. The team has managed with below-average production in left field given the great offense at every other spot. Boston has already addressed other holes by adding Aaron Hill, Brad Ziegler and Drew Pomeranz, but the Sox can certainly stand to improve over Brock Holt (pictured) in the outfield.

Chicago's rotation has remained remarkably healthy and effective, with a league-leading 2.89 ERA for its starters. The Cubs are very fortunate, as it was clear coming into the year that they lacked much insurance. Adam Warren was used as a spot starter at the end of the first half, but the team could use more insurance should the unthinkable occur.

The White Sox tried to fix their pitching issues by acquiring James Shields, but he's been less than a band-aid for the problem. Carlos Rodon remains on the DL with a wrist injury, and Jose Quintana has predictably regressed from his early season Cy Young Award pace. The White Sox are working in 2015 first-round pick Carson Fulmer (pictured) as a reliever but otherwise are lacking in the back end of their rotation. They could use more youth as they likely look toward 2017.

Cincinnati's pitching has been historically bad, but there is actually help on the way. Cody Reed has already arrived, and pitching prospects like Robert Stephenson, Amir Garrett, Rookie Davis, Tyler Mahle and Nick Travieso show the team has a brighter future. On the other hand, the Reds are in the bottom half of the NL in runs and lacking much help in the minors.

Yan Gomes (pictured) was a massive disappointment this season even before his recent shoulder injury. The Indians have managed without him thanks to their incredible starting rotation and unexpected big offensive seasons from Mike Napoli, Tyler Naquin and company. Catcher is certainly the weak link, and a player like Jonathan Lucroy would be a massive upgrade that could get Cleveland over the hump.

It was clear the Rockies were lacking much talent at first base when the spring training competition was veteran Mark Reynolds (pictured) vs. Ben Paulsen. The team has some talented pitching on the horizon and is set at most positions with the clear exception of first base.

The Detroit front office quietly added great starting pitching during its rebuild last season, acquiring Michael Fulmer (pictured), Daniel Norris and Matt Boyd. Unfortunately, it just hasn't been enough, evidenced by the team's reliance on Mike Pelfrey and Anibal Sanchez. The Tigers have some great pitching talent in the low minors, but that's too far away for their win-now effort. Another arm or two, either in the rotation or the pen, would do the team a lot of good as it fights for the Wild Card.

Last season the Astros were covered with top-end starting pitching, as Dallas Keuchel (pictured) won the AL Cy Young and Lance McCullers pitched like an ace after being promoted. This year Keuchel has an ERA near 5.00, and McCullers has been unreliable with 38 walks in 62.1 innings. The Astros have elite infield prospect Alex Bregman and Cuban signing Yulieski Gourriel likely to help the offense down the stretch, but they clearly need starting pitching help to get where they'd like to be.

The Royals had a second base competition of Omar Infante vs. Christian Colon in spring training, and neither player delivered. Infante was eventually released, and Colon has spent time in the minors. Minor league veteran Whit Merrifield (pictured) was fine for a while, but he has a sub-.600 OPS in July. Kansas City is sinking fast, but adding a second baseman — as its did last season with Ben Zobrist — could provide a huge boost.

The Angels' season has been a disaster, though not completely unexpected. However, their prospects for next season are looking even worse with major arm injuries to starting pitchers Garrett Richards (pictured), Andrew Heaney and Nick Tropeano. To put it bluntly, the Angels have no chance in 2017 unless owner Arte Moreno shells out serious dollars. With a farm system that's also barren, the team's situation is as dire as any in baseball.

The Dodgers had incredible depth coming into the season, but it apparently wasn't enough. They're now missing Clayton Kershaw (pictured), Alex Wood, Brett Anderson and Hyun-Jin Ryu. Even with a strong return from Brandon McCarthy, the rotation has major issues and will be in serious trouble if Kershaw needs back surgery. If the Dodgers want to make noise in October, now is the time for their stockpile of minor leaguers to return major league starting pitching.

The Marlins have been mentioned in as many rumors as anyone with their effort to add starting pitching. Wei-Yin Chen (pictured) has been a major disappointment as their offseason big-ticket addition, and they've seen musical chairs in the fifth starter role. Adding another starter is probably necessary for them to win an NL Wild Card slot.

Milwaukee's future looks bright after some nice additions at the trade deadline last year, but the Brewers must continue to add. The rotation shows potential with Jimmy Nelson (pictured), Zach Davies and top prospect Josh Hader, while the offense has a decent core that's about to get better with prospects Orlando Arcia and Brett Phillips. Still, there isn't quite enough to be competitive in the NL Central. If trades of Jonathan Lucroy and Ryan Braun are inevitable, now could be the time to cash in.

It will be an interesting trade deadline for the Twins with an interim GM. Despite their struggles this season, there's no doubt they have high-end young talent led by Miguel Sano, Max Kepler, Byron Buxton and Triple-A pitcher Jose Berrios (pictured). While they have some interesting low minors pitching, the Twins are lacking MLB-ready pitching and have allowed the most runs in the AL. They need to add pitching for 2017 if they don't want to repeat 2016.

Who would have thought the Mets would need a starting pitcher at the trade deadline? Matt Harvey's season-ending surgery and Zack Wheeler's continued injury setbacks necessitate an addition, not to mention the minor elbow issues that Noah Syndergaard (pictured) and Steven Matz have been fighting. If nothing else, a veteran innings eater could give the rest of the Mets' rotation more rest for the stretch run heading into October.

The Yankees sound like they'll be sellers at the deadline. They've seen flashes from their rotation this season, but few would mistake it for a top playoff rotation with an ERA near 5.00 this season. The offseason features one of the worst starting pitcher free agent crops we've ever seen, so trades will be necessary. Adding reliable starting pitching for 2017 will likely be a priority for GM Brian Cashman (pictured).

Oakland has continually gone one foot in and one foot out as a small-market team trying to remain competitive. This could finally be the time to blow it all up, particularly with Josh Reddick (pictured) and Rich Hill headed toward free agency. The team has impressive power prospects in the minors but could use more depth in all areas.

Philadelphia finally entered full rebuild mode last season and now has one of the best farm systems in baseball. Many of the team's top prospects will by ready by 2017, but the Phillies are at least a couple years from competing. They have building blocks in the rotation (Vincent Velasquez and Aaron Nola) and the lineup (Maikel Franco and Odubel Herrera) but need to add more to accompany their talent at Double-A and Triple-A.

No minor league team had a better rotation this year than Pittsburgh's Triple-A affiliate, featuring Tyler Glasnow, Jameson Taillon (pictured), Steven Brault and Chad Kuhl. All four of those pitchers have helped in the minors, but as Nats manager Dusty Baker would say, this isn't a tryout. The Pirates remain in contention for the playoffs and could use more reliable pitching in the rotation and bullpen.

San Diego started the rebuilding process early this season, trading James Shields, Fernando Rodney and Drew Pomeranz already. It's clearly not over yet, as we continue to hear Andrew Cashner (pictured) trade rumors. The team is looking toward the future after a failed attempt at contention in 2015.

The Giants are hoping to win another World Series, but their roster certainly has holes. Third base is perhaps the biggest, as Matt Duffy (pictured) wasn't able to match his rookie performance and has missed time to injury. The Giants have an impressive top three in their rotation but could use another bat to match the Nationals and Cubs.

Seattle isn't out of the race, but it needs to get moving quickly. The return of Felix Hernandez should provide a boost, but the outfield still has some issues. Nori Aoki (pictured) was a huge disappointment, and the team is probably best served leaving Nelson Cruz at DH for now. Another outfielder could add a boost, though leaving Cruz in the outfield and promoting newly acquired DH candidate Dan Vogelbach is also an option.

Trevor Rosenthal's (pictured) season has been a disaster, and Seth Maness hasn't been much better. With the Cardinals resistant to promote top pitching prospect Alex Reyes as a reliever, it's clear that they could use another arm in middle relief unless Rosenthal suddenly breaks out of his slump.

Tampa Bay has already promoted top pitching prospect Blake Snell (pictured), and it's loaded with more pitchers behind him. However, the Rays have several holes in the lineup that don't have a clear heir in the minors, including catcher, first base and the outfield corners.

The Rangers recently lost Prince Fielder and Shin-Soo Choo to the DL, but their offense has managed just fine this year with room to spare. The rotation has been an issue, however, specifically since Colby Lewis and Derek Holland got hurt. Yu Darvish (pictured) has returned from injury, but the team has still turned to the likes of Kyle Lohse recently. The Rangers must do better to finish off the Astros in the AL West.

Toronto's rotation has the sixth best ERA in baseball this season, but the Jays face a major dilemma in Aaron Sanchez's (pictured) supposed innings limit. He's their most talented pitcher, and shutting him down would have a serious impact on the team's playoff prospects. While there's probably no David Price on the market like last season, the Jays will need to replace Sanchez somehow.

While the Nats have the best bullpen ERA in baseball this season, adding a shutdown closer still seems like their biggest need. Veteran Jonathan Papelbon (pictured) has been in big games, but he lacks the velocity and dominance that he had earlier in his career. The team has also received some luck from Blake Treinen and Sammy Solis, whose control doesn't support the level of positive results they've seen.