Cary Edmundson / USA TODAY Sports

Oakland A's DL Kendall Graveman, recall Bruce Maxwell

Oakland A's Opening Day starter Kendall Graveman heads to the 10-day disabled list with a shoulder strain. UPDATED: The A's also learned that SS Marcus Semien will require surgery on his injured wrist.

The Oakland A's tough weekend got even tougher on Monday when the team announced that Opening Day starter Kendall Graveman was heading to the disabled list with a right shoulder strain. Graveman left his Friday start against the Houston Astros after only five innings and 75 pitches. He is the second A's regular to land on the DL over the past two days. Shortstop Marcus Semien was shelved on Sunday with a wrist contusion. UPDATE: The A's announced Thursday afternoon that Semien will require surgery on his right wrist and will be re-evaluated in six weeks.

Graveman was off to a terrific start before his injury. In 18 innings, he had a 2.00 ERA and a 1.00 WHIP over three starts. He has 12 strike-outs and five walks. The A's are 2-1 in Graveman's starts this season and have either been tied or had the lead when he has exited all three of his outings. The A's had a rainout on Sunday and stayed on turn despite the rainout, so Graveman may only need to skip one start if the recovery time is limited to 10 days.

Replacing Graveman is Bruce Maxwell, who made his major-league debut with the A's last season. The 26-year-old catcher hit .283/.337/.402 in 33 games for the A's in 2016. Maxwell was five-for-24 to start the season with Triple-A Nashville.

Down on the farm, the A's also made a switch within the A-ball rotations. Right-hander Boomer Biegalski earned a promotion to High-A Stockton from Low-A Beloit. Mitchell Jordan joins the Snappers' rotation from Extended Spring Training. UPDATE: The A's placed right-hander Daulton Jefferies on the Stockton DL. Biegalski will tandem with A.J. Puk. Evan Manarino and Dustin Hurlbutt will form the other tandem.

Other Notes:

-- Dakota Chalmers had the best outing of his career on Monday for Beloit in the Snappers' 2-1, 11-inning loss. Chalmers struck-out the first eight batters he faced and finished his four innings with 10 strike-outs and only one hit allowed.

-- J.P. Sportman collected two more hits for Midland and is now riding a 10-game hitting streak. He five hits in his last nine at-bats and is batting .366.

-- The Stockton Ports worked out of a 4-0 deficit, scoring 12 runs over three frames from the sixth, seventh and eighth innings to earn a 12-4 win over the Modesto Nuts. Chris Iriart and Sean Murphy each homered and five players had multi-hit games. Josh Vidales and Murphy each had three hits and Eli White had two hits and two walks. Logan Shore allowed three runs in the first but then settled down to throw three scoreless frames after that. Angel Duno followed with four innings to earn the win. Duno struck-out four and allowed one run.

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