43 Trey Ball
Position: Starting pitcher
Age: 22
Throws: Left
Bats: Left
Last year: 8-6, 3.84 ERA in Salem.
How obtained: First-round draft pick, 2013.
Note: Ranked Boston’s 15th best prospect by Baseball America.

29 Jalen Beeks
Position: Starting pitcher
Age: 23
Throws: Left
Bats: Left
Last year: Combined 9-8, 3.87 for Salem and Portland.
How obtained: 12th-round draft pick, 2014.
Note: Played with Andrew Benintendi at the University of Arkansas.

13 Danny Bethea
Position: Catcher
Age: 27
Throws: Right
Bats: Right
Last year: Played 31 games for Portland, threw out 8 of 31 base stealers.
How obtained: 34th-round draft pick, 2013.
Note: Played for St. John’s University in New York.

41 Ty Buttrey
Position: Pitcher
Age: 24
Throws: Right
Bats: Left
Last year: 4.44 ERA with Portland.
How obtained: Fourth-round draft pick, 2012.
Note: Converted to reliever after nine starts last year.

25 Jamie Callahan
Position: Pitcher
Age: 21
Throws: Right
Bats: Right
Last year: 3.29 ERA and 63 strikeouts in 65 2/3 innings with Salem.
How obtained Second-round draft pick, 2012
Note: Boston’s 28th best prospect according to Baseball America.

TBA Harrison Cooney
Position: Pitcher
Age: 25
Throws: Right
Bats: Right
Last year: Made only two appearances in Class A with the Angels.
How obtained: Selected in Triple-A Rule 5 draft last December.
Note: Currently on the disabled list.

18 Jake Cosart
Position: Pitcher
Age: 23
Throws: Right
Bats: Right
Last year: Had a 1.78 ERA and 104 strikeouts in 70 innings in Greenville and Salem.
How obtained: Third-round draft pick, 2014.
Note: Older brother Jarred Cosart is a starter for the San Diego Padres.

36 Jacob Dahlstrand
Position: Starting pitcher
Age: 25
Throws: Right
Bats: Right
Last year: 3.60 ERA in eight starts at three levels, including Portland
How obtained: 10th-round draft pick, 2010.
Note: Underwent Tommy John surgery in 2015.

10 Jake DePew
Position: Catcher
Age: 25
Throws: Right
Bats: Right
Last year: Batted .215 with nine home runs in Double-A for the Rays.
How obtained: Minor league free agent last November.
Note: A ninth-round draft pick of the Rays in 2010.

16 Rafael Devers
Position: Third base
Age: 20
Throws: Right
Bats: Left
Last year: Batted .282 with 11 home runs for Salem.
How obtained: International free agent, 2013.
Note: Ranked Boston’s No. 2 prospect by Baseball America.

17 Taylor Grover
Position: Pitcher
Age: 25
Throws: Right
Bats: Right
Last year: : 4.06 ERA and 73 strikeouts in 75 innings with Salem and Portland.
How obtained: 10th-round draft pick, 2013.
Note: Recorded at least one strikeout in 34 of 38 appearances last year.

19 Williams Jerez
Position: Pitcher
Age: 24
Throws: Left
Bats: Left
Last year: 4.71 ERA and 65 strikeouts in 65 innings in Portland.
How obtained: Second-round draft pick, 2011.
Note: Originally an outfielder; switched to pitching in 2014.

7 Tzu-Wei Lin
Position: Infielder
Age: 23
Throws: Right
Bats: Left
Last year: Recorded .223 average and .288 on-base percentage for Portland.
How obtained: International free agent, 2012
Note: Signed for $2 million bonus as 18-year-old from Taiwan.

21 Nick Longhi
Position: First base
Age: 21
Throws: Left
Bats: Right
Last year: Batted .282 with 40 doubles for Salem.
How obtained: 30th-round draft pick, 2013.
Note: Boston’s 14th best prospect according to Baseball America.

32 Austin Maddox
Position: Pitcher
Age: 25
Throws: Right
Bats: Right
Last year: 3.71 ERA and 62 strikeouts in 63 innings for Salem and Portland.
How obtained: Third-round draft pick, 2012.
Note: Filled in at Triple-A for three games (1.93 ERA).

23 Danny Mars
Position: Outfield
Age: 23
Throws: Right
Bats: Both
Last year: Batted .293 with 10 triples and 31 stolen bases for Salem.
How obtained: Sixth-round draft pick, 2014.
Note: Invited to the Arizona Fall League and batted .259.

51 Kevin McAvoy
Position: Starting pitcher
Age: 23
Throws: Right
Bats: Right
Last year: 8-9 with a 5.80 ERA in 22 starts for Portland.
How obtained: Fourth-round draft pick, 2014.
Note: The highest drafted player out of Bryant University.

5 Heiker Meneses
Position: Infielder
Age: 25
Throws: Right
Bats: Right
Last year: Played only 40 games in the Twins’ organization.
How obtained: Minor league free agent.
Note: Began career with Red Sox and played in Twins system the past two years.

28 Joseph Monge
Position: Outfield
Age: 23
Throws: Right
Bats: Right
Last year: Batted .293/.768 for Greenville and Salem.
How obtained: 17th-round draft pick, 2013.
Note: Born in the Bronx, Monge now lives in Puerto Rico, where he plays winter ball.

44 Mike Olt
Position: Infield
Age: 28
Throws: Right
Bats: Right
Last year: Batted .255/.777 in Double-A for the Padres, in 49 games before injury.
How obtained: Minor league free agent, 2017.
Note: Olt has played 135 major league games for the Cubs and White Sox, 2014-15.

11 Jordan Procyshen
Position: Catcher
Age: 24
Throws: Right
Bats: Left
Last year: Batted .249 with .304 on-base percentage with Salem.
How obtained: 14th-round draft pick, 2014.
Note: Played for Canadian junior national team in 2011.

15 Jose Rosario
Position: Utility
Age: 25
Throws: Right
Bats: Right
Last year: Batted a combined .275 in Double-A and Triple-A for the Yankees.
How obtained: Minor league free agent last December.
Note: Initially signed as a 17-year-old by the Yankees in 2009.

22 Josh Smith
Position: Pitcher
Age: 27
Throws: Left
Bats: Left
Last year: 61 strikeouts in 57 innings in Double-A for Pirates.
How obtained: Triple-A Rule 5 draft last December.
Note: Originally a 25th-round draft pick in 2012 by the Pirates.

31 Teddy Stankiewicz
Position: Starting pitcher
Age: 23
Throws: Right
Bats: Right
Last year: 4.71 ERA in 25 starts for Portland.
How obtained: Second-round draft pick, 2013.
Note: Totaled 75 starts and 416 1/3 innings in last three years.

12 Cole Sturgeon
Position: Outfield
Age: 25
Throws: Left
Bats: Left
Last year: Batted .267 with 18 doubles for Portland.
How obtained: 10th-round draft pick, 2014.
Note: Played two games in Triple-A last year, recording two doubles.

20 Aneury Tavarez
Position: Outfield
Age: 24
Throws: Right
Bats: Left
Last year: Batted .335/.886 for Portland.
How obtained: International free agent, 2010.
Note: Was a major league Rule 5 draft by the Orioles, but returned in April.

38 Luis Ysla
Position: Pitcher
Age: 24
Throws: Left
Bats: Left
Last year: Recorded a 4.04 ERA and 60 strikeouts in 55 innings for Portland.
How obtained: Trade with Giants for Alejandro de Aza, 2015.
Note: Red Sox placed him on the 40-man roster last fall.

3 Carlos Febles
Position: Manager
Age: 40
Last year: Manager of Portland

2 Lee May Jr.
Position: Hitting coach
Age: 48
Last year: Hitting coach for Greenville

33 Kevin Walker
Position: Pitching coach
Age: 40
Last year: Pitching coach for Sea Dogs

40 Mickey Jiang
Position: Coach
Age: 40
Last year: Coach for Portland