Corey Rosier has gotten his first full season as a member of the Red Sox organization off to a promising start.
The 23-year-old outfield prospect is coming off a month of April in which he batted a stout .310/.344/.466 with four doubles, one triple, one home run, eight RBIs, nine runs scored, 10 stolen bases, three walks, and 14 strikeouts in his first 17 games (58 plate appearances) with Double-A Portland.
On the road against the Erie SeaWolves last week, the left-handed hitting Rosier registered two multi-hit games in five attempts and clubbed his first homer of the year for the Sea Dogs, who took the final five games of the six-game series to improve to improve to an Eastern League-leading 16-5 on the season.
Among 92 qualified Eastern League hitters coming into play on Tuesday, Rosier currently ranks seventh in batting average, 19th in slugging percentage, 23rd in OPS (.810), first in stolen bases, second in speed score (9.3), and 22nd in wRC+ (128), per FanGraphs.
While the offensive production is undoubtedly encouraging, Rosier has posted suboptimal strikeout and walk rates of 23 and 4.9 percent, respectively. Those two factors have hindered his ability to get on base on a more-frequent basis, which subsequently allows him to pose even more of a threat on the basepaths.
Defensively, Rosier has past experience at all three outfield spots but has seen all of his playing time to this point in the season come in the corners. The 5-foot-10, 180-pounder has logged 112 innings in right and 26 innings in left. He has only committed one error between the two positions, though he has yet to record an outfield assist.
The Red Sox acquired Rosier and minor-league infielder Max Ferguson from the Padres ahead of last year’s trade deadline. The deal also sent veteran first baseman Eric Hosmer to Boston and pitching prospect Jay Groome to San Diego. Rosier closed out the 2022 season with High-A Greenville and struggled to a .163/.272/.275 slash line in 23 games (92 plate appearances) with the Drive.
After a full winter and spring with the Red Sox, though, it appears that Rosier has begun to settle in and get more comfortable with his new surroundings. That is understandable given the fact that the Maryland native has already been traded twice since being selected by the Mariners in the 12th round of the 2021 amateur draft out of UNC Greensboro.
A little more than four months after signing with the Mariners for $125,000 that July, Rosier was traded to the Padres along with left-hander Ray Kerr in exchange for infielder Adam Frazier. The Friars then dealt him, Ferguson, and Hosmer to the Red Sox for Groome the following August.
While some young players may be slighted by having to change organizations multiple times early on into their careers, Rosier actually takes pride in it. He explained as much in an over-the-phone conversation with MassLive.com’s Christopher Smith last month.
“I think it’s definitely cool to know I’m sought after and people see me fitting into their system somewhere,” Rosier said. “So that’s cool to know I’ve been a part of two big-league trades. So that’s the way I try to view it. Coming over in the middle of the season last year, it was a big transition. … But I think going through spring training with the Sox, getting more acclimated with the staff, getting comfortable, I think that’s really played a part in the early success that I’ve had in a small sample size.”
At present, Rosier — who does not turn 24 until September — is not regarded by any major publication as one of the top prospects in Boston’s farm system. That could soon change if he carries over the success he enjoyed in April into the month of May.
(Picture of Corey Rosier: Kelly O’Connor/sittingstill.sm
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