From a Red Sox site that evaluated the trade:
In return for Schwarber, the Red Sox gave up one of their top pitching prospects, right-hander Aldo Ramirez. Ramirez is currently eighth in the SoxProspects Rankings, holding steady for the season, even though he is currently on the disabled list with right-elbow tendonitis. For the year, the 20-year-old Ramirez has a 2.03 ERA and 1.13 WHIP in 31 innings with Low-A Salem. He has 32 strikeouts and only 8 walks and opponents are hitting .221/.269/.311 against him. Ramirez signed out of Mexico in April 2018 and made his debut in the DSL that summer. He participated in the Fall Instructional League after the 2018 season and moved up to Lowell in 2019, where he really impressed striking out 63 and walking only 19 in 61.2 innings. After the 2020 season was canceled, Ramirez again participated in the Fall Instructional League. He showed increased velocity, really impressing opposing scouts who identified him as the top pitching prospect there. Here is Ramirez's full scouting report.
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Career Notes: Red Sox purchased his rights from Aguascalientes in the Mexican League for $550,000 in April 2018. Showed advanced control for his age in the DSL in 2018. Participated in the 2018 and 2020 Fall Instructional League. Was identified by scouts as one of the top pitchers at the 2020 Fall Instructional League.
Summation: Potential back-end starter. Ceiling of a mid-rotation starter. Very interesting young arm with a strong track record of performance in the low minors against age-advanced competition. Has advanced feel for his age and has a solid chance to remain a starter. Has always thrown strikes and shows the early makings of a three-pitch mix, all with at least average potential. Does not stand out physically, but still young enough that he could grow some more. One of the more intriguing low minors arms in the system, but has a long way to go between what he is now and what he could be in the future.
Most of the article is about Schwarber. Seems to be a risky trade: a power-hitter who has shown that he can be a very good major leaguer, traded for a 20 year-old pitching prospect with elbow tendonitis, a pitcher with a "[c]eiling of a mid-rotation starter". I guess the Red Sox might not have traded a AA potential mid-rotation pitcher, and a AAA guy like that would already be pitching in the majors.
http://news.soxprospects.com/2021/07/trade-analysis-scouting-aldo-ramirez.html
