Mariners Claim Adam Oller

2:45pm: The Mariners have now officially announced the claim and that Oller will report to Triple-A Tacoma.

1:15pm: The Mariners have claimed right-hander Adam Oller off waivers from the Athletics, reports Jessica Kleinschmidt. The A’s hadn’t formally announced it, but Oller had recently been placed on outright waivers. The Mariners will assign Oller to Triple-A Tacoma for the time being, a source tells MLBTR. The Mariners haven’t announced the move yet, but they had multiple openings on the 40-man roster, so a corresponding move won’t be necessary.

Oller, 28, was acquired from the Mets alongside fellow right-hander J.T. Ginn in the trade that sent Chris Bassitt from Oakland to New York. He’s appeared in each of the past two seasons with Oakland — his first big league experience — but struggled to a 7.09 ERA with a 12.9% strikeout rate against an 11.9% walk rate in 94 innings. At the time of the trade, Oller was ranked 20th among Mets farmhands, per Baseball America, whose report tabbed him as a largely MLB-ready back-of-the-rotation starter or bulk reliever. Oller hasn’t thrown his slider as hard as advertised, however, and his swinging-strike rate and overall strikeout rate have both suffered as a result.

Oller posted a 3.45 ERA in 120 innings between the Mets’ Double-A and Triple-A affiliates in 2021, winning the organization’s minor league pitcher of the year award in the process. Though he struggled in the Majors last year, he still put up a 3.69 ERA at the Triple-A level. In 2023, however, he’s been hit hard both in the big leagues and the minors; he’s sitting on a 7.11 ERA in 50 2/3 frames, albeit with a solid 25.2% strikeout rate against a 10.3% walk rate.

For the Mariners, Oller will serve as depth either in an injury-plagued rotation or in a swingman role. Seattle lost 2021 AL Cy Young winner Robbie Ray to flexor and Tommy John surgery early in the season, and the M’s currently have Marco Gonzales (forearm strain) and Bryce Miller (blisters) on the injured list at the moment. They’re currently using rookie Bryan Woo in the rotation and also turned to journeyman southpaw Tommy Milone for a start not long before the break. Oller, who’s in the second of three minor league option years, can provide some up-and-down depth moving forward.

The Mariners have done well with low-profile pitching acquisitions in recent years, most notably turning minor league signee Paul Sewald into a high-end reliever. They’ve also coaxed strong performances out of unheralded trade acquisition Justin Topa and waiver pickups like Gabe Speier and Tayler Saucedo so far in 2023. They’ll aim to add Oller to that growing list of pitching successes.

Oller becomes the second pitcher acquired during the Athletics’ fire sale to depart the organization in under two years. The A’s also lost left-hander Zach Logue — acquired in the Matt Chapman trade — to the Tigers on waivers over the winter. Of the seven young pitchers they’ve tried in the rotation since acquiring them as part of the latest teardown, only southpaw JP Sears (4.32 ERA) has an ERA under 6.00. Not every arm they’ve acquired has pitched in the Majors yet, of course, but the early results of the Athletics’ latest wave of trades have not boded well, to say the least.