After two years in the Dominican Summer League, Red Sox prospect Armando Sierra made his long-awaited stateside debut in the rookie-level Florida Complex League last season.
As a 19-year-old, Sierra got into 30 of the FCL Red Sox’ 53 games in 2023. The right-handed hitter batted .265/.363/.398 with seven doubles, two home runs, 12 RBIs, 13 runs scored, 14 walks, and 30 strikeouts over 113 plate appearances for Boston’s Fort Myers-based affiliate.
Interestingly enough, Sierra played exactly 10 games in June, July, and August. He posted an OPS south of .600 in both June and August, but enjoyed a strong month of July in which he slashed .424/.525/.606 with one homer and six RBIs. It’s also worth noting that 99 of his 113 plate appearances last season came against righties as opposed to lefties.
Among the 96 hitters who made at least 110 trips to the plate in the FCL last year, Sierra ranked 33rd in batting average, 46th in on-base percentage, 37th in slugging percentage, 40th in OPS (.761), 37th in isolated power (.133), and 43rd in wRC+ (104), per FanGraphs.
On the other side of the ball, Sierra saw the bulk of his playing time in 2023 come at first base. The 6-foot-1, 189-pounder logged a team-leading 224 1/3 innings at first, where he committed four errors in 207 total defensive chances. He also served as his side’s designated hitter on two separate occasions.
Sierra, who celebrated his 20th birthday earlier this month, originally signed with the Red Sox for $150,000 as an international free agent coming out of the Dominican Republic in January 2021. At the time he put pen to paper, the Sabana Grande de Palenque native was viewed as an outfielder and was identified by Baseball America’s Ben Badler as a potential sleeper within Boston’s 2021 signing class.
While Badler described Sierra as having “an advanced approach to hitting for his age,” Red Sox assistant general manager Eddie Romero provided some more background on the signing in an email exchange with BloggingtheRedSox.com later that April.
“Armando was a player we scouted later on in his signing year. After scouting him a few times, he stood out for his strong frame and his power,” Romero wrote. “As we continued to see him, it became apparent that not only did he have above average power for his signing class, but he also was developing a stronger approach.”
Sierra made his professional debut in the Dominican Summer League that July and earned DSL All-Star honors while repeating the level in 2022. He was regularly seeing playing time at both corner outfield spots back then but was used exclusively as a first baseman in the FCL in 2023.
As things stand now, Sierra is not regarded by any major publication as one of the top prospects in Boston’s farm system. Last June, however, FanGraphs’ Eric Longenhagen wrote that he found Sierra “really interesting” because — despite having a “tough” profile — “his feel for contact and the flexibility in his lower half are both very impressive for a corner bat.”
Looking ahead, Sierra is currently projected by SoxProspects.com to make the jump to Low-A Salem for the start of the 2024 campaign. Assuming that is indeed what happens, it will be interesting to see how Sierra adjusts to stiffer competition while playing with a full-season affiliate for the first time in his young career.
