The A’s may have found a hidden gem on the waiver wire

2022 was a year of change for Brent Rooker, who was a member of four different organizations within the span of seven months. 

After five years with the Twins, Rooker was dealt along with Taylor Rogers to the Padres for Chris Paddack and Emilio Pagan in April 2022. 

From there, Rooker found himself on the move again at the trade deadline when San Diego sent him to the Royals for catcher Cam Gallagher. Rooker finished out the season in K.C. but was designated for assignment in November, paving the way for the Athletics to claim him off waivers.

As Rooker noted in a chat with MLBTR readers back in February, the specific timing of the trades made things particularly difficult since “one came on Opening Day of the Major League season and one was the very last deal of the deadline. I knew it was definitely possible that I was going to get moved at the deadline but once we reached 4 [p.m. EST], I thought I was safe, only to get called about 15 minutes later.

“The moving around is tough and its hard to get settled or into a routine with so much constant change. That being said, its just part of the job and something you have to learn to work through. I’m incredibly excited to be with Oakland and hope to play well and earn some major league opportunities!”

Stability isn’t usually a word associated with an A’s franchise that has made a habit of roster overhauls, including the latest fire sale that has seen the Athletics part ways with several prominent veterans as part of the latest rebuild. 

The result hasn’t been pretty, as the A’s entered play Saturday with a league-worst 7-26 record, and the increasing possibility of a move to Las Vegas has led to a lot of public discord amongst Oakland fans.

Though it all, however, Rooker has become a major bright spot in the early portion of the 2023 season. Entering the year with a career .200/.289/.379 slash line over 270 plate appearances in the majors, Rooker has exploded to hit .333/.442/.726 with 10 home runs over his first 104 PA in an Athletics uniform. Rooker’s slugging percentage and 218 wRC+ lead all qualifies hitters, and his on-base percentage also leads the American League.

This kind of huge breakout caught even Rooker himself a little off-guard. 

“In a vacuum, the numbers themselves are more than I ever thought I could do,” Rooker told MLB.com’s Martin Gallegos and other reporters last week. “That’s not taking away the confidence I have in myself.  That kind of production for a month’s worth of games is probably past even my expectations of myself, so that’s been a pleasant surprise for me.”

Such high-level production isn’t totally alien to Rooker, who has pretty consistently mashed minor league pitching over five seasons on the farm. This includes a career .274/.387/.590 slash line over 906 PA at the Triple-A level, which is a standout performance even with the caveat of 273 of those plate appearances coming in the hitter-friendly environment of the Pacific Coast League (with the Padres’ Triple-A affiliate). 

Rooker also carried some prospect pedigree as the 35th overall pick of the 2017 draft, and he was ranked 92nd on Baseball America’s top-100 prospects list prior to the 2018 season.

Despite this resume, Rooker couldn’t really break though on a Minnesota team that already had multiple up-and-coming outfielders on the active roster or in the farm system all vying for playing time. Rooker’s cause wasn’t helped when he suffered a fractured forearm in just his seventh big league game in 2020, and his only other extended taste of MLB playing time came in 2021, when he batted .201/.291/.397 over 213 PA for the Twins.

Still, that rough season had just enough glimmers of hope for Rooker that he told Gallegos and company that it has contributed to his big 2023 numbers. 

“The last two years, I’ve just been trying to figure out how to extend those good times that I had,” Rooker said. “I knew I could do it because I’d have weeks in Minnesota where I’d hit really well with a lot of success. That put it in my head and heart that I was good enough to do it. I just had to figure out how to do it for longer periods of time.”

It is probably safe to assume that some regression is inevitable, due to both Rookier’s .340 BABIP and the lack of track record to back up his early standing as an elite hitter. That said, there hasn’t been much luck in what Rooker has been doing, as his .479 wOBA is above his xwOBA. ... but not by much, as Rooker’s .447 xwOBA is still in the 99th percentile of all hitters. 

His barrel rate and walk rate are also both outstanding, and his overall hard-hit ball rate is well above league average. Strikeouts have been a persistent issue for Rooker throughout his career, but cutting his strikeout rate down to even a modest 22.1% (within the 49th percentile of hitters) has helped greatly, given what Rooker is doing with all that extra contact.

Landing a possible late bloomer on the waiver wire is a dream for any team, particularly a rebuilding Oakland club in sore need of some good news. Rooker entered the season with only one year and 59 days (1.059) of MLB service time, so he wouldn’t even gain arbitration eligibility until after the 2024 season, and free agency until after the 2017 season. 

Naturally, five great weeks doesn’t automatically turn a 28-year-old player into a building block, but if nothing else, Rooker’s presence gives the Athletics something to think about as they approach the trade deadline.

To be clear, all of that team control might make it unlikely that Rooker himself is traded, as the A’s might be intrigued enough to see what they really have in the outfielder beyond 2023. 

The idea can’t be entirely ruled out given the Athletics’ scored-earth approach to their rebuild process, but dealing Rooker after a big first half might backfire if Rooker does continue to be a quality regular going forward — “selling high” would perhaps become selling too soon.

Rooker has seen a lot of time at DH, and has seen some time in both corner outfield positions with borderline passable glovework. Not that Rooker is in any danger of losing at-bats at this point, but if any of Ramon Laureano, Tony Kemp, or Jesus Aguilar are moved at the deadline, that just opens up more playing time for Conner Capel or J.J. Bleday, with Rooker picking up any extra at-bats in the corner outfield or at DH. 

Kemp and Aguilar are the likeliest to be moved since they aren’t under contract beyond 2023, and while Laureano is arbitration-controlled through 2025, he has received some trade interest in the past.