1. Xander Bogaerts, SS: He’s with Boston now, but still is considered a prospect. The 20-year-old split time between Double-A Portland and Triple-A Pawtucket, batting a combined .297 with a .388 on-base percentage and a .477 slugging percentage. He also hit 15 homers with 67 RBIs, 23 doubles and six triples.
2. Henry Owens, LHP: See above
3. Jackie Bradley Jr., CF: His average has slipped to .276, but the 23-year-old has a .376 on-base percentage, .474 slugging percentage, 10 homers, 34 RBIs and 25 doubles.
4. Garin Cecchini, 3B: The 22-year-old has posted a remarkable .441 on-base percentage and a .908 OPS between Single-A Salem and Double-A Portland.
5. Anthony Ranaudo, RHP: The 23-year-old is 10-5 with a 3.04 ERA in 24 starts between Double-A Portland (19) and Triple-A Pawtucket (5).
The 5 most underrated prospects
1. Christian Vazquez, C: See above
2. Alex Hassan: The 25-year-old is not considered a top-20 prospect in the organization but has batted .315 with a .429 on-base percentage in 217 plate appearances for Pawtucket.
3. Mookie Betts, 2B: The 20-year-old former fifth-round pick is batting .308 with a .413 on-base percentage combined between Single-A Greenville and Single-A Salem.
4. Keith Couch, RHP: The 23-year-old is not considered one of Boston’s top pitching prospects. But he is opening some eyes. A 13th-rounder out of Adelphi, he has a 2.93 ERA in 15 starts for Double-A Portland.
5. Brian Johnson, LHP: MLB.com ranked the 22-year-old as Boston’s 14th best prospect entering this year. He has a 2.48 ERA in 18 starts between the Gulf Coast Red Sox (2), Single-A Greenville (15) and Single-A Salem (1).
A look at September call-ups
Teams are able to expand their active rosters to as many as 40 players starting today. The Red Sox plan to add eight or nine players in September.
The Sox recently traded for Quintin Berry. Berry stole 21 bases in 94 games for Detroit last year. Both he and infielder Brandon Snyder could get the call today.