Biggest question facing each MLB team in spring training for 2016

The O's return mostly the same lineup after catcher Matt Wieters accepted the team's qualifying offer and Chris Davis was re-signed in January. Their biggest loss came in the starting rotation, with Wei-Yin Chen cashing in with Miami. The loss leaves a glaring hole in the rotation, and the team will lean on Chris Tillman and Kevin Gausman to improve and fill the void.

Boston's new president of baseball operations, Dave Dombrowski, made a big splash in his first offseason with the Red Sox, trading for closer Craig Kimbrel and signing David Price to a record contract. Those moves will help after Boston allowed the second most runs in the AL last season, but will they be enough? The Red Sox are still relying on 2015 signings Hanley Ramirez and Pablo Sandoval to deliver and still have a very young and unproven rotation in the back end.

The Yanks have perhaps the greatest bullpen ever architected after trading for Aroldis Chapman, adding him to Andrew Miller and Dellin Betances. They'll effectively be playing six innings, but the lineup could be a ticking time bomb if the team expects big years from the aged Alex Rodriguez, Mark Teixeira and Carlos Beltran again. Age and injuries could be major factors, but the good news is that New York has top prospects Aaron Judge, Greg Bird and Gary Sanchez as replacement options.

Not that we should have expected the Rays to be active in free agency with their limited resources, but they've had an especially quiet offseason. Tampa Bay fell to 80 wins last season due to a lack of runs, finishing with the second fewest runs scored in the AL. Many expected the Rays to trade an arm for a bat, and there's still time to do so before Opening Day.

Toronto finished last season with the greatest positive run differential in baseball but fell short in the ALCS vs. the Royals. After losing David Price to free agency, Toronto has major questions in the rotation. A full season of Marcus Stroman and the return of J.A. Happ, signed in free agency, should help, but it remains to be seen if that will be enough to reach the ultimate goal.

The White Sox were a trendy sleeper pick last season after several offseason moves, but the lineup never got off the mat. They got limited contributions from additions Melky Cabrera and Adam LaRoche and almost nothing from their infield other than Jose Abreu. GM Rick Hahn has doubled down on the lineup, adding Todd Frazier, Brett Lawrie and Dioner Navarro. That should help, but it remains to be seen if it will be enough after scoring the fewest runs in the AL last season.

Few teams have as much talent in their starting rotations as the Indians, with Corey Kluber, Carlos Carrasco, Danny Salazar, Trevor Bauer and Cody Anderson. The problem for Cleveland last season was its lineup, with subpar years from Carlos Santana, Yan Gomes and Lonnie Chisenhall. The team added Mike Napoli in the offseason and will get a boost from a full season of hotshot young shortstop Francisco Lindor. Still, it might not be enough, especially with Michael Brantley likely to miss April with a shoulder injury.

The Tigers allowed an AL-worst 803 runs last season after losing Max Scherzer in free agency and trading David Price at midseason. They've addressed the rotation by signing Jordan Zimmermann and hope for a healthy year from Justin Verlander. From there, the rotation is a major wild card but isn't lacking upside with former top prospect Daniel Norris and former Yankee Shane Greene likely to fill slots in the rotation. We do know the lineup will score runs and could be improved after adding Justin Upton.

If you weren't sold on the Royals after their World Series appearance in 2014, they've certainly done enough after leading the AL in wins and winning the World Series in 2015. The lineup remains mostly intact, while the rotation replaced midseason acquisition Johnny Cueto with Ian Kennedy. The AL Central keeps getting more competitive, but the Royals will be considered the front-runners entering the season.

It can be argued that no team in baseball has more young, high-upside talent than the Twins. The first wave of talent allowed them to win 83 games last season, and they should get even bigger contributions from their young players this season, including Miguel Sano, Byron Buxton, Eddie Rosario and Tyler Duffey. Add top prospects Jose Berrios and Max Kepler, and this roster is beginning to look stacked. It remains to be seen if they're ready to make the playoffs, however, especially without a true No. 1 starter.

Years of dumping have made the Astros a stacked and deep young roster, and they had the second-best run differential in the AL last season. Still, they've been mostly quiet in the offseason, hoping a full year of young shortstop Carlos Correa, ace-in-the-making Lance McCullers and trade deadline acquisition Carlos Gomez will help the team improve. The Astros tailed off down the stretch, losing the AL West to the Rangers, and it remains to be seen if they have enough firepower to repeat last season's breakout.

We knew the huge contracts for Albert Pujols and Josh Hamilton would eventually come back to bite the Angels, and it's happened sooner than expected. They made no meaningful free agent signings this offseason, though the Angels did address the infield by trading for Andrelton Simmons and Yunel Escobar. The lineup seems especially thin beyond Trout, Pujols and Kole Calhoun, while the rotation has major questions after Garrett Richards and Andrew Heaney. Lacking much minor league depth, this team could be in big trouble if it has a few major injuries.

Billy Beane and company always have tricks up their sleeves, and that was certainly the case this offseason. Knowing they couldn't compete for the big-ticket free agents, the team signed Rich Hill, Henderson Alvarez, Ryan Madson and John Axford to smaller deals, hoping their upside and past success will shine. Most likely, those moves will make for trade chips when the A's fall out of contention, but it's not impossible that those moves and a pending influx of youth will make Oakland competitive again.

New GM Jerry Dipoto wasted no time making the Mariners into his vision, adding Nate Karns, Steve Cishek, Joaquin Benoit, Chris Iannetta, Adam Lind, Nori Aoki and Leonys Martin, to name a few. The team still has the same core, but the pieces Dipoto added could be the difference in Seattle's ability to compete this season.

On the outside, it looks like GM Jon Daniels stood pat this offseason, but the roster looks impressive upon closer examination. The Rangers go in to Opening Day with Cole Hamels as their ace and have former ace Yu Darvish close behind as he returns from Tommy John surgery. They also hope for a healthy Derek Holland and have some very exciting hitting youth in Joey Gallo, Lewis Brinson and Nomar Mazara on the horizon, along with the return from injury of former top prospect Jurickson Profar. This could be the year for Texas.

The Braves' farm system is absolutely loaded and added significantly more depth in the offseason after trading Andrelton Simmons and Shelby Miller. The organization is building toward 2017 and will be slowly but surely calling up its minor leaguers this season. Among the players Braves fans should be excited about seeing at some point in 2016 are center fielder Mallex Smith, shortstop Dansby Swanson, and pitchers Aaron Blair, Sean Newcomb, Chris Ellis and Lucas Sims.

The Marlins made significant investment in their coaching staff this year, adding new manager Don Mattingly, hitting coach Barry Bonds and naming former Pirates pitching coordinator Jim Benedict as their VP of pitching. There are plenty of issues for this group to fix, but the biggest issue in 2015 was the team's lack of hitting. The Marlins scored the second fewest runs in baseball and have done almost nothing on the field to address the problems during the offseason. The return of Giancarlo Stanton from injury will help, but the team is really counting on Marcell Ozuna, Christian Yelich and Martin Prado to pick up the slack.

The Phillies led baseball in losses last season, and it could easily happen again with a roster that is extremely unproven. They were able to get something for Chase Utley from the Dodgers last season, and only veterans Ryan Howard and Carlos Ruiz remain from the team's glory days. The veterans will be profiled early in the year, with the organization hoping it can cash in whatever those players have left. Elsewhere, the Phillies do have some promising young talent but certainly not enough to approach .500.

The Mets rode the coattails of their incredible, young starting rotation to the World Series last season, falling short vs. Kansas City. They could be even better this year with full seasons from Noah Syndergaard and Steven Matz, along with the return of Zack Wheeler from elbow surgery. The lineup also looks improved relative to early 2015, adding Asdrubal Cabrera and Neil Walker to the infield and bringing back Yoenis Cespedes. This team will go as far as the rotation can take them.

There have been few sports teams in recent memory that were more disappointing than the 2015 Nationals. They won only 83 games despite the addition of Max Scherzer and Bryce Harper's MVP breakout. This year, the team has lost Jordan Zimmermann and Ian Desmond, but the Nats signed Daniel Murphy and have some exciting young talent to help in 2016. Ultimately, the team's success and failure will be put on the shoulders of new manager Dusty Baker, who has plenty of experience leading clubs in San Francisco, Chicago and Cincinnati, but also has no absence of critics.

There's no question the Cubs are the favorites to win the World Series this season after a great offseason, adding Jason Heyward and Ben Zobrist. That's on top of the lineup boost they should see from a full season of Kyle Schwarber, along with the development of Kris Bryant and Addison Russell. Manager Joe Maddon has mastered getting through the regular season, but he's never won a World Series in his managerial career. Fans are hoping the team can win its first World Series since 1908.

The Reds seem to be dumping, already trading Todd Frazier and Aroldis Chapman this offseason. They still have some very attractive pieces, including Jay Bruce, Brandon Phillips and Joey Votto. Cincinnati clearly can't compete with the Cubs, Cardinals or Pirates in the short term, so those three names could be with other organizations by the end of 2016.

The Brewers got old quickly in 2015 and dumped some of their talent at the trade deadline. They have some attractive pieces left, but some are also expensive. Catcher Jonathan Lucroy has already requested a trade, and Ryan Braun would probably be available for a team looking to take on his contract. Matt Garza and Jean Segura could also be available for teams looking to add secondary pieces.

The Pirates have been run like a model organization in recent seasons, but their biggest challenge could come this year after the Cubs' additions. Pittsburgh lost A.J. Burnett and Neil Walker during the offseason but has envious depth due to its strong farm system. The farm system could come into play this season, with top prospects Josh Bell, Tyler Glasnow and Jameson Taillon likely to play key roles.

St. Louis was outbid by the rival Cubs for Heyward, and its only major offseason move was signing back-end starter Mike Leake. The organization's core is aging, with Adam Wainwright and Matt Holliday missing significant time last season, and Yadier Molina is likely to miss the start of 2016 following wrist surgery. The team has also lost Lance Lynn for the year after Tommy John surgery. The Cards need Stephen Piscotty, Brandon Moss and Randal Grichuk to have big years to make up for Heyward's loss.

Few teams made more noise this offseason than the Diamondbacks, signing Zack Greinke and trading for Shelby Miller. Those pitchers add to Patrick Corbin, making a formidable rotation that could compete along with a lineup that scored the second-most runs in the NL last season. After making those additions, Arizona has lost some of its depth, and it'll be counting on big seasons from Yasmany Tomas, David Peralta and Jake Lamb, among others.

Colorado's pitching staff has been historically bad recently, even figuring in the impact of Coors Field. The Rockies were especially quiet during the offseason and should be in a rebuilding year while a few top prospects make it to the Majors. The rotation still looks lean behind Jorge de la Rosa, but youngsters Chad Bettis and Jon Gray at least give them some upside.

The Dodgers were heavily criticized for letting Zack Greinke sign with a division rival, but they still had a quietly strong offseason by adding incredible pitching depth. The key additions include Kenta Maeda, Scott Kazmir and Joe Blanton. That adds to last year's addition of Alex Wood, the return of Hyun-Jin Ryu from injury, eventual return of Brandon McCarthy, and the pending arrivals of elite pitching prospects Jose De Leon and Julio Urias. Still, anything short of the World Series is a failure, and this recipe for ultimate success is unproven.

The Padres seemed to go all-in last offseason, but new GM A.J. Preller's plan failed miserably. They've offloaded major dollars this offseason, including Craig Kimbrel, Joaquin Benoit and Jedd Gyorko, but most of last season's rotation remains intact. The Padres aren't expected to compete with a thin bullpen and poor lineup that will be even worse after losing Justin Upton, but the front office has still resisted completely rebuilding.

The Giants were barely overshadowed by the Diamondbacks this offseason, signing Jeff Samardzija and Johnny Cueto to long-term deals. The organization has won three of the last six World Series and hopes to continue its recent pattern of winning it all every other year. The returns of Hunter Pence and Joe Panik, along with the addition of Denard Span, could be key factors in San Francisco's attempt.