Casey Tefertiller

With his position in question and his power potential up for debate, Jordan Diaz had an encouraging growth season and may have found a position where his pure batting upside could play.

Catcher Shea Langeliers was the top-ranked prospect the Athletics acquired in their offseason trades. This season he offered a glimpse of his potential at Triple-A and during his MLB debut.

The hard-hitting rookie joins the organization in the midst of a tear-down. His hitting upside, defensive versatility and Triple-A production make him priority play for 2022.

After a year away from the game, the former Marlins employee enthusiastically embraces a new challenge keeping Oakland’s minor leaguers housed.

The 2020 first-rounder showed elite hitting traits in his pro debut, but the A’s were even more impressed with his improved throwing.

The 21-year-old first baseman/outfielder improved a skill that helped him on defense and the bases.

An ability to reach base and a willingness to learn catcher helped the 26-year-old join the 40-man roster.

The 2021 second-rounder from Virginia wowed the organization with his adaptability and pure hitting ability.

The 22-year-old took a step forward to solidify himself as the Athletics’ shortstop of the future.

The 23-year-old righthander is having a breakthrough season after working with the team astrophysicist.

The 20-year-old has impressed in his first test of full-season ball by showing additional power with his notable bat-to-ball skills.

The 2017 third-rounder has always been an excellent defensive shortstop, but his bat has caught fire this season.

The hard-working lefthander moved into the High-A rotation and showed improved stuff and strike-throwing ability.

The Athletics are letting the 18-year-old shortstop get his feet settled in his first minor league season.

The 2019 first-round shortstop out of Clemson has improved his swing from both sides of the plate.

The offseason trade acquisition didn’t get serious about baseball until he was a college junior, but he has developed as a professional.

If Barrera succeeds at Triple-A, he could receive a quick callup to Oakland.

The 25-year-old could help the big league club as a utility infielder after a bounceback 2019 campaign.

The 24-year-old righthander worked with coaches at the alternate training site to advance his promising pitch mix.

Drafted in the third round this year, the Georgia Tech outfielder showed no rust as he got right to work at instructional league.