The Oakland Athletics were very busy during the off-season and despite trading away slugger Josh Donaldson to Toronto, they were still able to pick up a few pieces. Acquisitions such as Billy Butler and Ben Zobrist should help the club immediately in 2015, but losing Donaldson will still limit the offensive output. Brett Lawrie, Ike Davis and Marcus Semien will contribute power, but the A's likely won't have a player who hits more than 25 home runs in 2015.

St. Louis returns for the new season with essentially the same pieces as 2014 with the exception of Jason Heyward in the second spot of the lineup. Although the Cardinals look great on paper, they scored 619 total runs last year (23rd overall) and were 29th in the league in home runs (105). However, despite the poor showing in 2014, the Cardinals will be led offensively by Matt Holliday, Jason Heyward and Matt Carpenter. You can also expect Matt Adams to lead the team in slugging and home runs in 2015. 

Last year, the Mariners shocked everyone by signing second baseman Robinson Cano to a mega-deal. This off-season, the Mariners add to their arsenal by signing Nelson Cruz to a four-year deal. Despite a terrific 2014 season from the 34-year-old DH, the Mariners will be disappointed with Cruz in the middle of their lineup. In addition to Cruz, the team also plans to have Seth Smith primarily in RF and a platoon of Rickie Weeks and Dustin Ackley in LF. In addition to Cano, Kyle Seager will once again play a major role for the Mariners lineup. Even though the M's overpaid for Cruz, they should still have a productive lineup.

The Dodgers made a splash during the off-season by trading longtime outfielder Matt Kemp to the division rival San Diego Padres. With the Kemp move, the Dodgers plan on giving a lot of playing time to prospect Joc Pederson. The Dodgers also re-built their middle infield and catching position, acquiring Howie Kendrick, Jimmy Rollins and Yasmani Grandal, respectively. Yasiel Puig is still an explosive player who will lead the team in offense, with support from Adrian Gonzalez in the third/fourth lineup spot.

Andrew McCutchen, the 2013 NL MVP, did not disappoint in 2014. The same is for sure in 2015, as the 28-year-old can do it all and will once again be the focal point of the Pirates lineup. The corner outfield spots will be primarily played by prospects Starling Marte and Gregory Polanco. The Pirates also went out on the international free agent market and signed Jung-ho Kang to play beside Neil Walker. The Pirates lineup has a good blend of on-base percentage, power and scoring runs.

Even with the status of Miguel Cabrera and Victor Martinez still unknown for the start of the season, the Tigers are still in good shape. J.D. Martinez and Yoenis Cespedes add enough power to support the middle of the lineup; however, the Tigers can easily win the AL Central with a fully healthy Miguel Cabrera and Victor Martinez. It will be interesting to see what the Tigers do at the top of the lineup in regards to Anthony Gose, Ian Kinsler and Jose Iglesias.

4) Washington Nationals

The Nationals for the most part have the same parts from 2014, with Ryan Zimmerman filling in for Adam LaRoche at first base. Bryce Harper and Anthony Rendon are an exciting, young tandem in the National League and will carry a bulk of the scoring for the Nats this season. The supporting cast of Jayson Werth, Wilson Ramos and Ian Desmond is more than enough to make the Nats one of the top offensive lineups in the National League.

Mike Trout, Mike Trout, Mike Trout - He can carry an entire team. Although Albert Pujols isn't what he once was, he's still able to produce positive numbers for an entire season. Additionally, C.J. Cron will have a bigger role this season, especially if Josh Hamilton is out for an extended time. Kole Calhoun and Matt Joyce will play in the corner outfield spots for the Angels this season and each could have 20 home runs, respectively.

Toronto has typically had a great "paper lineup" in previous years, but has always been hurt by injuries. This season is no different, as the Blue Jays added Josh Donaldson and Russell Martin to an already productive starting nine. Jose Bautista, Edwin Encarnacion, Donaldson, Martin and Jose Reyes is a terrific core to build a lineup around. The only question mark will focus on CF and the play of Dalton Pompey and Kevin Pillar. Toronto should once again be in the top five among team home runs, slugging and runs scored.

The 2013 season for the Red Sox. Very good. The 2014 season for the Red Sox. Very bad. To ensure that likely doesn't happen in 2015, the Red Sox went out and acquired Hanley Ramirez and Pablo Sandoval (among others) via free agency. David Ortiz is 39 years old, but still has the ability to hit 30 homers. Utility player Mookie Betts is likely to find himself atop the Red Sox lineup and starting in CF. Additionally, Boston has Cuban imports Rusney Castillo and Yoan Moncada who could provide support at some point this season.