• 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