Arias leads Red Sox prospects pushing for Triple-A promotion

Franklin Arias has turned a defense-first scouting report into a bat that is starting to force Boston’s hand. The 20-year-old shortstop, signed out of Venezuela for $525,000 in January 2023, had seven homers in nine games by late April and was carrying a Double-A-best .420 average, production strong enough to make a Triple-A move feel less like a reward than a correction.

That is exactly the kind of push MLB Pipeline was talking about in mid-June, when it framed the month as moving season in the minors. By then, sample sizes are large enough for clubs to know who has clearly outgrown a level, and Arias is trending like a player who has done enough damage at Double-A Portland to earn a tougher test. MLB Pipeline has him as the Red Sox No. 2 prospect, and the offensive breakout matters because he was originally viewed more for his glove than his bat. Baseball Savant still gives him a 60 hit grade and a 60 fielding grade, which only sharpens the case: if the hit tool is playing this way now, Boston has a real decision to make.

Arias is not alone. Seattle’s Kade Anderson, ranked the Mariners’ No. 2 prospect and MLB’s No. 21 overall prospect, has been just as forceful at Double-A Arkansas. Anderson reached this stage after Tommy John surgery in spring 2022 as a junior in high school kept him off the mound until his freshman year at Louisiana State, where he became a frontline arm, led NCAA Division I with 180 strikeouts in 119 innings and won Most Outstanding Player in the College World Series during LSU’s title run. The pro version has been even more imposing: MLB reported on June 19 that Anderson had a 1.02 ERA after five straight scoreless starts. That kind of run usually does not stay parked in Double-A for long.

Carlos Lagrange is taking a different route, but the destination could be the same. The 23-year-old Yankees right-hander signed out of the Dominican Republic for just $10,000 in February 2022 and reached Triple-A Scranton/Wilkes-Barre with the kind of power arsenal that changes a game in one pitch. He posted a 4.41 ERA in 11 starts there before the Yankees shifted him to the bullpen in early June, a move that may get him to the majors faster without abandoning his future as a starter.

The stuff has already played up. MLB reported that Lagrange’s fastball averaged 98.9 mph in Triple-A and hit 103.0, then jumped to 101.4 mph in his first relief appearance, when he struck out seven. That is the profile teams watch in June: not just whether a prospect is good, but whether he is so clearly past the level below that a callup stops being a question of if and starts becoming a question of when.