For all the talk about how short this season has been, there has been plenty that every team has learned about itself. And one of the key things any team can learn: Who is in this for the long haul?

So, today at the Thirty, we take a look at the player on each team whose positive 2020 season has helped establish himself as a vital member of his team moving forward. Who has emerged this season?

AMERICAN LEAGUE EAST

Blue Jays -- Teoscar Hernandez, OF

Under club control: Through 2023

The Jays had to send him down for a while in 2019 to straighten out his swing, and the improvement he showed down the stretch last year has more than carried over to this season. He’s currently on the IL with an oblique strain, but on a rate basis it has been him -- not Bo Bichette, not Vlad Jr., not Cavan Biggio -- who has been the best hitter on the team this year, by a wide margin.

Orioles -- Pedro Severino, C

Under club control: Through 2023

The Orioles have always had hope for Severino, but honestly, when you look at him right now this looks like a starting All-Star catcher, doesn’t it? And he’s only 27.

Rays -- Mike Brousseau, UTIL

Under club control: Through 2025

Considered a journeyman, barely-hanging-on guy heading into the year, he suddenly looks like these Rays' version of Ben Zobrist.

Red Sox -- Alex Verdugo, OF

Under club control: Through 2024

There hasn’t been much to be positive about at Fenway Park this year, but it turns out the return on the Mookie Betts trade looks like a player who indeed will be part of this outfield for years to come.

Yankees -- Clint Frazier, OF

Under club control: Through 2024

The Yankees always knew Frazier could hit, but the fielding was so bad they didn’t know if they could afford to keep him around. But now that he’s hitting like this, who cares what he does with his glove? Not to mention, he's made strides with his glove.