Latest Blue Jays' Arizona Fall League roundup: Jake Bloss impresses as Aaron Parker’s bat heats up

The Toronto Blue Jays’ season is over, but several players in their system still have something to prove in October. Toronto sent eight players to the Arizona Fall League to make up for lost time, sharpen their skills and build momentum heading into 2027.

Jake Bloss has delivered encouraging outings, while Aaron Parker’s bat has started to turn heads. These are still small samples, but the performances are worth watching as Toronto evaluates its depth for next season.

Arizonal Fall League participants could be valuable depth pieces for the Blue Jays pitching staff

Jake Bloss

Bloss has looked good in the Fall League. In three games, he's thrown 6.2 innings while striking out six and posted a 2.70 ERA and 0.75 WHIP. He recently had his best start in the Fall League up to this point. He threw 2.2 innings, allowed one earned run and struck out six. His fastball was up to 95.6 mph and managed six whiffs throughout the outing.

It was an encouraging outing for Bloss, who is out of options heading into the next season. With a strong Fall League showing, Bloss could have an inside track at a spot on the Opening Day roster as a reliever. It is a matter of staying healthy for the righty as he has worked diligently to improve his pitches and mechanics.

Brandon Barriera

Barriera has worked as a reliever in the Fall League and the results have not been great thus far. He has thrown 3.2 innings, allowing six walks while only striking out two, and his ERA and WHIP sit at 4.91 and 2.18, respectively.

For the lefty, the stats probably come second to him and the Blue Jays compared to the in-game reps he is getting. He has spent most of his career on the sidelines overcoming injuries. The average level of competition in the Fall League is usually around the Double-A level. With Barriera only making it to High-A in 2026, he may be a bit outmatched right now.

Yondrei Rojas

Rojas has had a solid Fall League thus far. In six innings with the Solar Sox, he has a 3.00 ERA and 1.33 WHIP with a 5:4 K:BB ratio. He has yet to regain the swing and miss that he previously had last season. Having already made it to Triple-A in 2026 and being Rule 5 eligible this offseason, Rojas may be of intrigue to other teams if he finishes the Fall League well.

Fernando Perez

Perez has only pitched in one outing since the last check in. In that outing he threw 1.2 scoreless innings, allowing a walk and striking out two. The righty spent most of 2026 on the Development List after struggling mightily with his command. Regardless of a strong Fall League showing, it would be a surprise if a team took the 22 year old during the Major League portion of the Rule 5 Draft.

Gilberto Batista

Batista has made four appearances in the Fall League. In his five innings, he has a 5.40 ERA and unsightly 2.00 WHIP with a 6:5 K:BB ratio. After seeing his strikeout rate decline while his walk rate increased in 2026, those same issues have reared its head in the Fall League. Not Rule 5 eligible until 2027, Batista has one more season to turn things around with the Blue Jays.

These hitters could make an impact as soon as 2027

Jake Cook

Since our last update, Cook has continued to look good with the Solar Sox. In eight games, Cook has a slash line of .333/.394/.333 with three RBI and seven stolen bases, and a 9:2 K:BB ratio. The 20th ranked prospect according to MLB Pipeline needs to improve his 45-grade hit tool in order to get the most out of his speed. He will also need to cut down on the strikeouts drastically in order to succeed as he does not possess much in-game power.

Jake Casey

Casey has endured a rough Fall League to this point. In 10 games, the 23rd ranked prospect is hitting .094/.275/.219 with one home run, three RBI, six stolen bases, and a frightening 16:3 K:BB ratio. While he possesses average power, his hit tool is a big cause for concern as he looks overmatched in the Fall League. Already 23-years-old, time is slowly running out for Casey to be a productive big leaguer.

Aaron Parker

Parker has played very sporadically in the Fall League. In four games, the 23 year old is hitting .438/.550/.625 with one home run, five RBI, one stolen base, and a pristine 2:4 K:BB ratio. While the sample size is really small, it is encouraging to see him cut down on the strikeouts.

After spending most of 2026 at catcher, Parker added left field to his resume which could get him to the big leagues sooner considering Alejandro Kirk and Brandon Valenzuela are the current incumbent catchers with the Blue Jays.

Bloss’ outings and Parker’s productive at-bats have provided the Blue Jays some reasons for optimism within their prospect contingent at the AFL. Turning these extra reps into meaningful improvements will be the next step in training camp.

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