Jackson threw a simulated game in the team's spring facility in Arizona on Tuesday, Martin Gallegos of MLB.com reports.

EDGE Analysis

Jackson has been prepping for an eventual short-term assignment at Triple-A Las Vegas. Tuesday, the veteran right-hander threw approximately 70 pitches, a solid workload that should go along way toward stretching him out. Jackson is eventually expected to be utilized at the big-league level at some point this season after going 6-3 with a 3.33 ERA across 17 starts.

Jackson, who signed a minor-league deal with the Athletics on Wednesday, is heading to extended spring training in Arizona to start bullpen sessions, Dave Sessions of MLB.com reports.

EDGE Analysis

The veteran right-hander will use his time in Arizona to begin acclimating his arm to the rigors of the season after not having participated in any spring training. The plan is for Jackson to eventually make his way to Triple-A Las Vegas and stretch out with some starts in anticipation of a callup at some point this season. Jackson was a key figure in an injury-riddled Athletics rotation last season, going 6-3 with a 3.33 ERA across 17 starts.

Jackson signed a minor-league contract with the Athletics on Wednesday, Jon Heyman of MLB Network reports.

EDGE Analysis

Jackson apparently received a major-league offer from Oakland at some point this offseason, according to Heyman, but he decided to continue testing his options to no avail. The 35-year-old had a 3.33 ERA, 1.22 WHIP and 68:37 K:BB across 92 innings (17 starts) with the Athletics last season.

Jackson took a no-decision in Wednesday's 9-3 win over the Mariners after giving up three runs on five hits and five walks and striking out two over 4.1 innings.

EDGE Analysis

The five walks were Jackson's most in any of his 17 starts this season, with the right-hander also hitting a batter and finding the strike zone on just 47 of his 84 pitches. This was Jackson's final outing of the regular season, so the shaky performance won't help his chances of capturing a rotation spot in the ALDS, should the Athletics defeat the Yankees in a wild-card game. Over his five September appearances, Jackson turned in a 4.18 ERA and 1.39 WHIP while failing to work more than six innings in any of those starts.

Jackson will start Wednesday against the Mariners, Jane Lee of MLB.com reports.

EDGE Analysis

Jackson was expected to toe the rubber Tuesday, but after Daniel Mengden was named Monday's starter, Jackson was pushed back a day. Through 16 starts this season, he owns a 3.18 ERA and 1.16 WHIP with 66 strikeouts across 87.2 frames this year.

Jackson (5-3) tossed six innings and got the win Sunday, allowing just one run on three hits and two walks while striking out two batters in the 8-2 win over the Mariners.

EDGE Analysis

After allowing an RBI single to Nelson Cruz in the first inning, Jackson settled in and cruised through the rest of his afternoon. The 34-year-old journeyman continues to be a welcomed surprise in Oakland's starting rotation with a 2.91 ERA in 74.1 innings so far in 2018. He'll face the Rangers at home on Saturday.

Jackson's next start was bumped from Monday to Tuesday at Houston, Susan Slusser of the San Francisco Chronicle reports.

EDGE Analysis

Manager Bob Melvin wants to give his starting rotation an additional day of rest, so everyone will be bumped back a day as Chris Bassitt is recalled from Triple-A to start Sunday. Jackson will still face the Astros, which mustered two runs and five hits over five innings during their previous matchup.

Jackson (4-3) took the loss Wednesday against the Rangers, allowing four runs on seven hits (including two homers) in just 4.1 innings, striking out two while walking three.

EDGE Analysis

Jackson allowed a run in four of the five innings in which he appeared, including solo shots to Shin-Soo Choo in the first and Joey Gallo in the fourth. He was knocked out with one out in the fifth following an Adrian Beltre RBI single. The poor start seems to be just a blip in a surprisingly effective season for the veteran, as he'd allowed just two runs over his last four starts combined. His ERA still sits a just 2.97. He'll face a tough opponent in his next start, travelling to Houston on Monday.

Jackson (3-2) allowed just one unearned run on five hits over 6.1 innings in a win over the Tigers on Saturday. He struck out three and issued one walk.

EDGE Analysis

The 34-year-old has not allowed an earned run over his last two starts (12 innings). He's teased us with strong stretches here and there in recent years before imploding, and the peripherals suggest that what he's doing now is mostly fluky (6.7 K/9, 4.01 FIP, 4.57 SIERA). Chase these results at your own risk. Jackson lines up to face the Angels in Los Angeles in his next start.

Jackson (1-2) got the loss against the Giants on Friday, giving up three earned runs on four hits, striking out six and walking one as the Athletics eventually fell 5-1.

EDGE Analysis

He didn't get the win but it was still another quality start for the veteran right-hander-his fourth in five trips to the mound this season. He's still only thrown 30.2 innings, but Jackson is providing solid returns so far, as he's got a 2.93 ERA, a 0.95 WHIP and 23 strikeouts since his season debut on June 25.