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8/24/2014 3:20 P.M. ET

Phelps DFA'd to make room for Gonzalez

CHICAGO -- The Orioles officially recalled Miguel Gonzalez from the Minor Leagues prior to Sunday's start against the Cubs, designating infielder Cord Phelps for assignment to clear a spot on the active roster.

Phelps was hitless in three at-bats for the Orioles this season, and the move leaves the O's with a short bench for the next week until September's roster expansion.

Leading up to Sunday's start, Gonzalez pitched to a 3.80 ERA in 20 games (19 starts) for the Orioles and was re-added to the rotation with struggling righty Ubaldo Jimenez moved to the bullpen last week.

Machado's surgery scheduled; headed to LA

CHICAGO -- Manny Machado will undergo season-ending right knee surgery on Wednesday in Los Angeles, the same corrective procedure he had a year ago on his left knee.

The surgery will once again be performed by Dr. Neal ElAttrache -- also the Dodgers' team physician -- who will repair Machado's partially torn medial patellofemoral ligament (MPFL). Machado is expected to stay out there for 2-3 weeks before going to the team's spring facility in Sarasota, Fla., to continue his rehab.

The team is hopeful that Machado, who missed the first month of the season last year after undergoing surgery in October, will have more of a regular winter and be ready for Spring Training.

Brittany Ghiroli is a reporter for MLB.com. Read her blog, Britt's Bird Watch, and follow her on Facebook and Twitter @britt_ghiroli. This story was not subject to the approval of Major League Baseball or its clubs.