Starting pitching
Righthander Phil Hughes returns after missing most of last season because of thoracic outlet syndrome. Ervin Santana, Kyle Gibson and Hector Santiago figure to take the next three spots. Jose Berrios and Tyler Duffey figure to fight for the fifth spot, but Adalberto Mejia, Trevor May, Nick Tepesch, Ryan Vogelsong and even prospect Stephen Gonsalves will be looking to impress, too.
Bullpen
Glen Perkins, recovering from shoulder surgery, likely won't be ready for Opening Day. Brandon Kintzler is in line for the ninth inning again. Ryan Pressly had a strong 2016 while appearing in a career-high 72 games. May could land back here. Free agent Matt Belisle, 36, should help. Michael Tonkin and J.T. Chargois throw hard and are working on precision. Craig Breslow, Taylor Rogers, Buddy Boshers and Ryan O'Rourke will fight for lefthanded spots.
Catcher
In an effort to improve the pitching, the Twins upgraded the catching by signing free agent Jason Castro. He will throw out a few basestealers, but his best skills are framing pitches and calling games. John Ryan Murphy and Chris Gimenez will battle for a backup role.
First base
The expectations never have been as low for Joe Mauer, who batted .261 with 11 home runs and 49 RBI last season. He heated up last August and looked ready for a strong finish before he scored from first on a double Aug. 17 and limped the rest of the season, batting .146 over the final 22 games. Now in the seventh year of an eight-year, $184 million contract, Mauer will need to DH a couple of times a week. Hitting lefties used to be a strength; last year, he hit .224 against them.
Second base
Brian Dozier belted 42 home runs in 2016 and immediately landed in Hot Stove League trade talks. He was told late last month that he wasn't going to be dealt before the season and returns as the marquee name in the lineup. Dozier was an unstoppable force in the first half of 2015 and the second half of last season. Eduardo Escobar or Ehire Adrianza could fill in on the few days Dozier takes off.
Shortstop
Jorge Polanco appears to profile better as a second baseman than a shortstop. His Ultimate Zone Rating of -10.9 was 30th among shortstops who played as many innings at the position as he did. His arm isn't the strongest, but the Twins remain committed to helping him get better. He hit .282 in 69 games, so the Twins love his offensive potential. Escobar or Adrianza could spell him. Prospect Nick Gordon could debut this year, too.
Third base
Miguel Sano began last season in right field, which was a disaster. He was moved back to his regular position, third base. That was a disaster, too, as he posted an .896 fielding percentage. He's in better shape than a year ago and has had an offseason to work out at third. How much will that help? Sano is expected to see time at DH, so Escobar or Adrianza could see action there on those days. But Sano's big bat needs to stay in the middle of the order all season.
Left field
Eddie Rosario was terrific in left field in 2015 but wasn't as sharp last year and spent some time in the minors. He can sting the ball but often chases pitches out of the zone and needs to fine-tune his pitch selection. He has good range and a fairly accurate arm (26 assists over the past two seasons). Robbie Grossman backed him up last year, but he's not very polished in the field. Danny Santana, J.B. Shuck or Drew Stubbs could emerge as backups.