The Red Sox have promoted power-hitting infield prospect Mason White from High-A Greenville to Double-A Portland, as was first reported by Andrew Parker of SoxProspects.com.
White is currently ranked by both Baseball America and SoxProspects.com as Boston’s No. 27 prospect. The 22-year-old has reached the upper minors in his first full professional season after being selected by the Red Sox in the fourth round (118th overall) of last summer’s draft out of the University of Arizona. He received a $642,200 signing bonus and made his pro debut with Low-A Salem before moving up to Greenville, where he opened the 2026 campaign.
In 68 games for Greenville out of the gate this year, White batted .270/.362/.525 with 14 doubles, three triples, 14 home runs, 42 RBIs, 36 runs scored, 31 walks, and 63 strikeouts over 282 plate appearances. The left-handed hitting slugger slashed .317/.417/.537 in 48 plate appearances against lefties and .261/.350/.522 in 234 plate appearances against righties.
Among 71 qualified South Atlantic League hitters entering play Saturday, White ranks ninth in isolated power (.254), 10th in slugging percentage and OPS (.887), 11th in batting average, 14th in wOBA (.386), 15th in wRC+ (121), 18th in swinging-strike rate (10%), 24th in on-base percentage, and 27th in strikeout rate (22.3%), according to FanGraphs.
Defensively, White primarily split his playing time with Greenville between second base and shortstop. In 35 starts at second, the 5-foot-11, 178-pounder committed two errors in 136 chances across 308 1/3 innings. In 27 starts at short, he committed one error in 87 chances across 237 1/3 innings. He also made five starts at DH.
White, who turns 23 in September, is the third member of Boston’s 2025 draft class to make the jump to Portland this season, joining third-rounder Anthony Eyanson and 13th-rounder Jack Winnay. Though there will be questions about how he adjusts to tougher, higher-quality pitching at Double-A, his promotion nonetheless helps the Sea Dogs address the void left by fellow infielder Marvin Alcantara, who was placed on the 7-day injured list on Friday.
(Picture of Mason White: Gwinn Davis/Greenville Drive)