Red Sox top prospect Triston Casas boasting .455 on-base percentage in Arizona Fall League; ‘We’re really excited about him,’ Chaim Bloom says

Red Sox top prospect Triston Casas continues to have no issues with getting on base in the Arizona Fall League.

Starting at first base and batting cleanup for the Scottsdale Scorpions on Monday afternoon, Casas went 2-for-4 with a pair of singles, an RBI, two runs scored, and was hit by a pitch as part of an 11-10 loss to the Mesa Solar Sox at Sloan Park.

With approximately 675 spectators in attendance, Casas began his productive day at the plate by ripping a two-out single off Cubs right-hander Ryan Jensen in the top of the first inning and later scoring on a bases-loaded RBI single from Giants prospect Marco Luciano.

After committing a fielding error in the bottom half of the frame, Casas was drilled by a pitch from Jensen in the second, but was stranded at first base.

In the top of the third, however, Casas bounced back when he laced a run-scoring single back up the middle off Athletics righty Brock Whittlesey that plated Giants prospect Will Wilson to make it an 8-0 contest in favor of Scottsdale.

Casas himself scored his side’s 10th run and his second run of the afternoon later in the inning, but that would prove to be the Scorpions’ last bit of offense with Solar Sox pitching shutting them out the rest of the way on their way to a comeback victory.

While Scottsdale may have fallen to an underwhelming 8-15 on the AFL season, Casas raised his batting line with the Scorpions up to an impressive .333/.455/.429 to go along with three doubles, one home run, nine RBI, 15 runs scored, 12 walks, and 16 strikeouts over 16 games spanning 77 plate appearances.

Among qualified hitters in the Arizona Fall League this year, Casas ranks seventh in hits (21), ninth in batting average, eighth in on-base percentage, 23rd in slugging percentage, and 20th in OPS (.883), per

Casas, who turns 22 in January, is currently regarded by Baseball America as both the top prospect and the best hitter for average in the Red Sox farm system.

This past season, the left-handed hitting infielder began the year with Double-A Portland, where he slashed .284/.395/.484 (142 wRC+) with 12 doubles, two triples, 13 homers, 52 RBI, 57 runs scored, six stolen bases, 49 walks, and 63 strikeouts over 77 games and 329 total trips to the plate.

Casas’ time with the Sea Dogs was interrupted on two separate occasions due to his commitment to Team USA. The former first-round draft pick helped the United States baseball team win a silver medal in the Summer Games in Tokyo before returning stateside for good in early August.

Shortly thereafter, Casas earned himself a promotion to Triple-A Worcester for the final stretch of the minor-league season on September 22. He batted .242/.381/.485 (130 wRC+) with three doubles, one triple, one home run, seven RBI, six runs, one stolen base, eight walks, and eight strikeouts in nine games (42 plate appearances) for the WooSox.

Because of the time he missed while playing for Team USA, the Red Sox opted to have Casas play in the Arizona Fall League in order to get more at-bats against some of the brightest pitching prospects in baseball.

It goes without saying that the decision to have Casas play in the desert has paid off thus far. The Sox are clearly excited with what they have in the 21-year-old, but will not take any shortcuts in his development.

When speaking with reporters on Sunday night, Red Sox chief baseball officer acknowledged as much, noting that getting Casas to the majors is not the team’s top priority since they have other options available at first base, such as Bobby Dalbec.

“Triston just got to Triple-A,” Bloom said. “I know he’s getting some reps in the fall league right now. But you guys have heard me say and know how I feel about that level (Triple-A) being a real test. We want to make sure that somebody has mastered that level before you have them take on the huge adjustment to the major-leagues.

“But, you know, in the long run, we’re really excited about him,” added Bloom. “And that doesn’t preclude us from adding other options to help us in the near, or in the medium term.”

So, while Casas may be in line to make his big-league debut at some point during the 2022 season, the Red Sox will by no means be rushing things with the 6-foot-5, 250 pound first baseman from Miami.

In the meantime, though, Casas should be on track to play in the Fall Stars Game at Salt Rivers Field this coming Saturday.

(Picture of Triston Casas: Norm Hall/MLB Photos via Getty Images)

Author: Brendan Campbell

Blogging about the Boston Red Sox since April '17. Also support Tottenham Hotspur.

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