BALTIMORE -- Triple-A knuckleballer Eddie Gamboa received a 50-game suspension without pay on Friday after testing positive for exogenous testosterone, a performance-enhancing substance in violation of the Minor League Drug Prevention and Treatment Program.
"There's a lot of sidebars to this stuff," said manager Buck Showalter. "Still is what it is, a violation of the policy set down by baseball. Obviously I know a lot more about [the suspension]. Gamby was on the radar here, so it's unfortunate."
Gamboa, who was slated to pitch for Norfolk on Friday, will serve the suspension immediately. The O's also released knuckleballer Zach Clark, who -- like Gamboa -- converted to a knuckleball last season. Clark appeared in one game for the Orioles in 2013.
Gamboa, 29, is 4-5 with a 4.06 ERA in 14 games (12 starts) this season. He was second in the International League with 74 strikeouts in 77 2/3 innings.
Machado awaits hearing for suspension appeal
BALTIMORE -- Manny Machado will not begin serving his five-game suspension this weekend, and it looks increasingly as if Machado will wait until his appeal is heard.
Manager Buck Showalter wouldn't divulge the exact date of the hearing, but it doesn't look like it will be held during next weekend's three-game series in New York, when the Orioles face the Yankees, starting Friday. But it could occur on Thursday, when the Orioles have an off-day before the start of that series.
"I don't know what I'm supposed to say and not say and what have you," Showalter said prior to Friday's game against the Blue Jays. "I know that serving the suspension is not imminent."
Machado, who was handed a five-game suspension and a fine for his role in a benches-clearing incident on Sunday that included him throwing his bat, is hoping for a reduced sentence. When Machado does serve his suspension, regardless of length, the Orioles will need to add an infielder, which will change their roster construction since they will have to play a man down.
"When you look at the precedents of other situations like this, we feel like, and Manny feels like, it's a little strong," Showalter said of the five-game punishment. "I got some clarity on what I think we are going to be dealing with. Just a matter of how many games."
• Matt Wieters will see Dr. James Andrews on Monday for a follow-up visit on his right elbow, and Showalter said the organization will go one of two ways with the All-Star catcher after that. Wieters will either resume his throwing program or have surgery.
"We always said, 'What if Matt [gets hurt]? What are we going to do?' Well, here we are. I hope that we get some good news on Monday, but you better prepare like you're not," Showalter said.
• Wei-Yin Chen will start Monday's game, with the rest of the three-game set against Tampa Bay undecided. Miguel Gonzalez could start one of those, and Showalter said he hoped to have more clarity on the rotation on Saturday.
• The Orioles announced the signing of a trio of Draft picks on Friday night, inking third baseman Riley Palmer (31st round), right fielder Jamill Moquete (32) and center fielder Tad Gold (35), to bring their total of signed players to eight.
Brittany Ghiroli is a reporter for MLB.com. Read her blog, Britt's Bird Watch, and follow her on Twitter @britt_ghiroli. This story was not subject to the approval of Major League Baseball or its clubs.