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03/02/11 1:51 PM ET

Nats' Meredith undergoes Tommy John surgery

VIERA, Fla. -- Nationals right-hander Cla Meredith had Tommy John surgery in Washington on Wednesday. Dr. Wiemi Douoguih performed the procedure.

Meredith started having elbow problems about two weeks ago while throwing his first bullpen session of the spring. He was hoping that the pain was caused by scar tissue breaking up inside the elbow.

Meredith took time off and then started feeling pain Friday while playing catch. This past offseason, Meredith had bone chips removed from the elbow.

Meredith signed a Minor League deal with the Nationals last month. He was competing for a spot in the bullpen. Last season, Meredith played for the Orioles and allowed nine runs over 15 innings.

"If he didn't make the team, he would have been a nice option to have in the Minor Leagues," manager Jim Riggleman said. "He was the unlucky one this year. It has happened all over baseball."

Maya supremely confident after first outing

VIERA Fla. -- Nationals right-hander Yunesky Maya is a confident person. After Wednesday's 8-4 victory over the Marlins, Maya made a bold prediction: "The Cuban kid is gonna win 20," he said through interpreter Javier Castro, who is an assistant for clubhouse manager Mike Wallace.

Maya, 29, has every reason to be confident. He showed signs this offseason that he is on his way to becoming a quality pitcher. He was named the 2010 Dominican Winter League Pitcher of the Year.

Maya went 4-2 with a 1.32 ERA in eight games for Leones del Escogido. He struck out 42 batters in 41 innings. His fastball was clocked as high as 93 mph.

The success in winter ball carried over into his first Spring Training game against Florida. He pitched two scoreless innings and struck out three.

"I felt real good being the first day," Maya said. "Winter ball help me out 100 percent. I had the opportunity in winter ball to come and show what I got. That helped me come prepared for Spring Training. I feel 100 percent that -- God willing -- I will be ready to go.

"I have more confidence in my fastball, and I'm throwing my curveball with a little more speed. All my pitches are working pretty good."

Catcher Jesus Flores came away impressed by what he saw from Maya on Wednesday.

"He was very good controlling his stuff," Flores said. "He will throw everything -- fastball, curveball, slider, changeup. He is the kind of guy that can paint the corners -- inside, outside. So today, he looked very confident, very aggressive and he was throwing a lot of strikes."

Gorzelanny, Wang set to take mound for Nats

VIERA, Fla. -- Left-hander Tom Gorzelanny and right-hander Chien-Ming Wang will pitch their first games of the spring on Friday in a Minor League intrasquad game. They are expected to pitch two innings.

Gorzelanny fell behind in camp after suffering a bad case of the flu.

Wang is recovering from a weak right shoulder and has not pitched in a Major League game since 2009.

Wang had said he most likely would be ready to pitch in a Major League game in late April or May. However, Wang changed his tune Friday. After throwing live batting practices, Wang is now hoping to be on the Opening Day roster.

Reliever Rodriguez arrives in Nats camp

VIERA, Fla. -- Nationals right-hander Henry Rodriguez arrived in camp Wednesday and took his physical. He has missed most of Spring Training because of visa issues.

However, Rodriguez was able to work out in Venezuela before coming to the United States. He said it will take about one to two weeks before he gets up to speed in Major League camp.

"I feel great. It's a new start in the organization for me," Rodriguez said through interpreter Javier Castro, an assistant to clubhouse manager Mike Wallace. "It wasn't my fault [I wasn't able to make it to Spring Training on time]. It was all on the Venezuelan council. It took a while to process the visa."

Manager Jim Riggleman said Rodriguez will have bullpen sessions and live batting practices before he plays in an exhibition game.

Rodriguez, who was acquired from the Athletics for outfielder Josh Willingham last December, will compete against Drew Storen, Tyler Clippard and Sean Burnett for the closer role.

Nationals agree to terms with 18 players

VIERA, Fla. -- The Nationals have agreed to terms on 2011 contracts with pitchers Ross Detwiler, Atahualpa Severino, Collin Balester, Brian Broderick, Adam Carr, Cole Kimball, Garrett Mock, Elvin Ramirez, Henry Rodriguez, Craig Stammen and Drew Storen; catcher Wilson Ramos; infielders Ian Desmond, Danny Espinosa and Chris Marrero; and outfielders Roger Bernadina, Corey Brown and Nyjer Morgan.

Additionally, the Nationals have renewed the contracts of right-handers Tyler Clippard and Jordan Zimmermann.

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.