According to MLB.com's David Wilson, Machado suffered a sprained right knee during Baltimore's 11-3 win over the New York Yankees on Aug. 11:
"The Orioles' decision to place Manny Machado on the 15-day disabled list Wednesday wasn't a surprise, just another hurdle in a frustrating season for the third baseman.
"Machado, who missed the first month of the season with a torn medial patellofemoral ligament in his left knee and served a five-game suspension at the start of July for a bat-throwing incident, sprained his right knee during an 11-3 win against the Yankees on Monday. The All-Star broke his bat on a ground ball to Derek Jeter and twisted his right knee in the process. He was helped off the field by manager Buck Showalter and head athletic trainer Richie Bancells, and had an MRI on the knee the following day, which confirmed the sprain.
"'It's part of the game,' Machado said on Wednesday. 'We play 162 games. We give what we need to give every day to help the team win. It's one of those situations where your body gets banged up.'
"The O's haven't given a timetable for Machado's return. He'll be eligible to return from the DL on Aug. 27, but chuckled at the suggestion that he could return in two weeks. He says he'll return when he's able 'to go out there and be 'Manny Machado.'
"In his place, the Orioles can split up their second-base platoon of Ryan Flaherty and Jonathan Schoop and play one at third base or use Chris Davis at the position until Machado returns. The latter was their plan for Wednesday, with Flatherty still filling in for injured shortstop J.J. Hardy.
"'I'm looking to see if we can get him on the 27th,' manager Buck Showlater said. 'If not, the 28th. If not, the 29th. I feel confident that it's 'when' and not 'if.'
"In Machado's stead, Baltimore recalled Cord Phelps from Triple-A Norfolk. Phelps hit .258 with a .358 on-base percentage for the Tides this year. He has a .159 career batting average in 113 at-bats over three seasons with the (Cleveland) Indians."
THIS JUST IN: Orioles 3B Manny Machado has sprained his right knee ligament. Machado's return timetable is uncertain. pic.twitter.com/LMY1CeZeW2— SportsCenter (@SportsCenter) August 12, 2014
With Machado's injury, The Baltimore Sun's Eduardo A. Encina says the Orioles face a stiff challenge as shortstop J.J. Hardy is also out with a left thumb sprain:
"In recent weeks, the Orioles have built the largest division lead in baseball as they chase their first American League East title in 17 years, but the club now faces the possibility of being without All-Star third baseman Manny Machado for an extended amount of time.
"An MRI performed Tuesday revealed no apparent structural damage, and the club said Machado was diagnosed with a right-knee ligament sprain.
"In some ways, that was good news -- especially given how Machado's season ended last season with a left-knee injury that required offseason surgery -- but it appears that this injury could force Machado to the 15-day disabled list.
"'That's under construction,' Orioles executive vice president Dan Duquette said Tuesday. 'It may take some time for him to heal. Obviously, we'll know more tomorrow, but I'd say that's a consideration right now.'
"Machado's injury is compounded by the fact that shortstop J.J. Hardy hasn't played since Saturday because of a left thumb sprain, putting the status of both members of the team's American League Gold Glove left side of the infield in limbo.
"With that, it could be viewed as a blessing that the Orioles' game against the New York Yankees on Tuesday at Camden Yards was postponed because of rain. Not only does it give both players an extra day to heal, but it also gave the Orioles' decision-makers another day to figure out a way to shuffle the club's roster."
The Orioles are currently first place in the AL East with a 69-50 (.579) record through Aug. 14.