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3/25/2014 1:29 A.M. ET

Mattheus may not be on Opening Day roster

JUPITER, Fla. -- Right-hander Ryan Mattheus has missed most of Spring Training because of chest inflammation and may not make the Opening Day roster, according to Nationals manager Matt Williams.

Entering Monday's action, Mattheus had pitched just 1 2/3 innings with three strikeouts.

"He has to try to build arm strength. To take him into a pressure situation right now with him not having enough innings in spring -- it's not fair," Williams said.

Mattheus said his arm is in great shape and feels he could be ready for Opening Day.

"I feel great," he said. "I do need a workload, I do need a few more innings. But I came into camp in shape. The arm being in shape is not going to be a question."

Jordan states case; no decision yet on fifth starter

JUPITER, Fla. -- Nationals right-hander Taylor Jordan made a great case to become the fifth starter in the team's rotation Monday. He allowed a run in 5 2/3 innings and struck out two in a 4-1 victory over the Marlins.

Jordan is competing against Tanner Roark and Chris Young for the fifth spot, but Jordan reiterated that he wasn't thinking about that.

"I'm not really confident in anything. I'm going to play it by ear," Jordan said. "I'm happy to go to Triple-A. It's still a bump up for me. I've never even been to Triple-A. So like I said last year: It was a blessing to be up in the big leagues. I didn't expect anything."

For the spring, he was 2-2 with a 3.92 ERA. Jordan was pleased with his performance considering that he was coming off a right ankle injury this offseason. He broke the ankle coming out of a swimming pool last October.

"After breaking my ankle this offseason, I'm extremely pleased that I'm as healthy as I am right now," Jordan said.

Manager Matt Williams declined to say when he will make a decision on his fifth starter, but he said it will be difficult.

"We don't have a deadline. We are going to get back to [Viera, Fla.] today and talk about it," Williams said. "I imagine that we talk about it [Tuesday] and get a consensus from everybody. No deadline as of right now."

Whomever wins the fifth spot in the rotation, he will likely pitch the home opener April 4 against the Braves.

Righty prospect Treinen reassigned to Minors camp

JUPITER, Fla. -- The Nationals reassigned right-hander Blake Treinen to Minor League camp on Monday morning.

Treinen said he wanted to leave a good impression before Spring Training ended, and it's safe to say he did. After getting hit hard in his first relief appearance, Treinen only allowed one run in his last 8 2/3 innings and notched seven strikeouts.

According to manager Matt Williams, Treinen -- ranked as the Nats' No. 17 prospect by MLB.com -- was thankful to get a long look, and the Nats let him know that he is in the next wave of players who could be in the big leagues soon.

"He proved everything he had to prove this spring to us. We were all pleasantly surprised because of his progress, the way he threw the baseball," Williams said.

Treinen could start the Minor League season as a starter or reliever for Triple-A Syracuse. The Nationals want to stretch him out as a starter for now, though Treinen has told Williams that he likes pitching in relief as well.

"His stuff plays at any point during a game," Williams said. "It's a bowling ball at 97 [mph]. So that's all good. We have some depth in the starting roles. So he may be able to help us in the bullpen as well."

Versatile Kobernus has chance to make club

JUPITER, Fla. -- Nationals outfielder/infielder Jeff Kobernus has a chance to make the team out of Spring Training. It helps that he has been versatile under manager Matt Williams, playing second base and all three outfield positions. He can also provide speed off the bench.

"We are going to continue to give him opportunities. Kobe offers a lot of things to us," Williams said.

Kobernus admitted that it's in the back of his mind "a little bit" about making the 25-man roster.

"You try and go out there -- whether you are in rookie ball or the big leagues -- and play," Kobernus said. "Let the cards fall where they are going to fall. You make the team, you don't make the team, you do what you do and you let [the team] tell you where you can go."

Nationals release catcher Snyder

JUPITER, Fla. -- The Nationals have released catcher Chris Snyder, who could have opted out of his contract Wednesday.

Going into Spring Training, it looked like Snyder had a solid chance to be the backup catcher behind Wilson Ramos, but the Nationals acquired catcher Jose Lobaton from the Rays last month. Lobaton will start the season as the backup catcher.

Snyder has had a productive Spring Training for Washington, going 5-for-17 (.294) with one home run and five RBIs. Snyder was with the Nats last Spring Training before opting out of his contract and signing a Minor League deal with the Angels.

Worth noting

During their home opener on April 4, the Nationals will pay tribute to those affected by last September's tragedy at the Washington Navy Yard, located a few blocks from Nationals Park.

Bill Ladson is a reporter for MLB.com and writes an MLBlog, All Nats All the time. He also could be found on Twitter @WashingNats. This story was not subject to the approval of Major League Baseball or its clubs.