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Brad Rempel-USA TODAY Sports

This offseason, the Rangers improved more than every other AL West club. Let's take a look.

Oakland Athletics

The A's top free-agent signing was Scott Kazmir to a two-year, $22 million deal. They'll be paying a guy with a career .520 winning percentage, 4.16 ERA and a 1.40 WHIP more money per year than Yu Darvish makes with the Rangers. Eleven million per is quite a bit for Kazmir, who hasn't been truly dominant since 2007 with the Rays. He figures to be Oakland's no. 2 starter behind Sonny Gray.

Meanwhile, the A's lost Bartolo Colon, who was probably their best starter last year, to the Mets. They traded starter Brett Anderson to the Colorado Rockies. Anderson was their No. 1 starter just two years ago. Offensively, they made no significant lineup upgrades. If anything, they lost Seth Smith, who consistently grinded out at bats, to the San Diego Padres.

The A's really just bolstered the bullpen, which might be the best in baseball. A trade for Jim Johnson and Luke Gregerson makes their pen frightening. But at the end of the day, the Rangers have a noticeably better offense and a more proven rotation.

Seattle Mariners

Robinson Cano does not a team make. After also signing Corey Hart and trading for Logan Morrison, they have a logjam of first base/DH types and still don't have any solid outfielders. With the price they paid for Cano, they could have made themselves a better team than they are now.

The Mariners' rotation is still only two-deep with Felix Hernandez and Hisashi Iwakuma. If they sign Tanaka or Ervin Santana and then add Taijuan Walker to the mix, they might have the best rotation in the division. But not yet.

LA Angels

Trading Mark Trumbo to the Arizona Diamondbacks was seen as a mistake by many people. But he did bring back Hector Santiago and Tyler Skaggs from the Chicago White Sox and Arizona, respectively. Still their rotation is average at best. Jered Weaver, CJ Wilson, Santiago, Richards and Skaggs is probably the third-best rotation in the division.

At the plate, the Angels took a step back offensively by trading Trumbo, a 30-100 hitter. He was a thorn in Texas' side for a couple of years. They are still relying on aging and overpaid Albert Pujols and Josh Hamilton to produce like they did two and three years ago. Mike Trout is the only sure thing in that lineup.

Houston Astros

Trading for Dexter Fowler and signing Scott Feldman probably just helped them escape from the 100-loss zone. They are still two to three years from making the playoffs.