Oller, who allowed two earned runs on four hits and a walk while recording five strikeouts across three innings in a Cactus League win over the White Sox on Friday, was informed following his start that he'd made the Opening Day roster, Martin Gallegos of MLB.com reports.

EDGE Analysis

Manager Mark Kotsay gave Oller the good news right in the dugout as the 27-year-old wrapped up his third outing of spring. Gallegos separately reported that Oller's fastball got as high as 96 mph in Friday's start and consistently sat in the 93 mph-94 mph range, and that the well-traveled rookie will be in the mix for either a possible rotation spot or multi-inning relief role to start the campaign.

Oller and J.T. Ginn were traded from the Mets to the Athletics in exchange for Chris Bassitt on Saturday, Anthony DiComo of MLB.com reports.

EDGE Analysis

Oller is a 27-year-old who's yet to make his big-league debut, but he's potentially more interesting than most players who fit that description. He closed last season with a strong eight-start run for Triple-A Syracuse, cruising to a 2.45 ERA, though that came with a 10.2 percent walk rate and a merely above-average 24.3 percent strikeout rate.