OAKLAND -- Jesús Luzardo's lack of command in Saturday¡¯s loss to the Orioles was atypical from what the A¡¯s have seen for most of the left-hander¡¯s career.

Turns out, there may have been a reason for that.

Prior to Sunday¡¯s series finale against Baltimore, Luzardo was one of two A¡¯s pitchers placed on the 10-day injured list, joining right-hander J.B. Wendelken (strained left oblique).

Luzardo¡¯s official diagnosis was a left hand fracture. More specifically, it was Luzardo¡¯s left pinkie that was fractured, with A¡¯s manager Bob Melvin revealing that the injury occurred before the game when Luzardo bumped his hand on a desk while playing video games.

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Though Luzardo proceeded to go through his normal warmup routine under the watchful eye of the A¡¯s training staff and both parties felt comfortable with him making the start, he began the game ominously by issuing a leadoff walk to Cedric Mullins. Lasting just three innings, he was pulled after a 35-pitch third that included two wild pitches.

X-rays after the game revealed the hairline fracture in his left pinkie. As of Sunday, Melvin said Luzardo¡¯s pinkie was a bit more swollen than the previous day, adding that it was too early to get a real timetable on how long the 23-year-old lefty might be out.

¡°I think there¡¯s a way to keep his arm in shape because it is on the far side of the hand, but the training staff will have a lot to say about that,¡± Melvin said. ¡°Really don¡¯t know [how long]. It depends on how it heals and responds.¡±

Luzardo is 1-3 with a 5.79 ERA in six starts this season with 30 strikeouts against 12 walks across 28 innings. In his absence, the A¡¯s will revert back to a five-man rotation after expanding it to six members earlier this week to incorporate the return of Mike Fiers.

Right-hander Jordan Weems and left-hander Adam Kolarek were both recalled from the A¡¯s alternate site in Stockton, Calif., on Sunday, giving the club a full eight-man bullpen.

¡°With Weems and Kolarek here, we¡¯re back to a regular complement in the bullpen,¡± Melvin said. ¡°We¡¯ll just stay in rotation with the regular guys.¡±

Olson returns
There was some good news for the A¡¯s on Sunday, with Matt Olson returning to the starting lineup. The slugging first baseman had missed the previous three games with a swollen left eye, the result of hitting a ball in batting practice that ricocheted off the L-screen prior to a game at Tampa Bay.

¡°His eye is open,¡± Melvin said. ¡°It still looks like he¡¯s got quite a shiner. But he is a tough guy and he wants to play.¡±

Olson entered Sunday leading the club in home runs (6), RBIs (17), and batting average (.296).