Zimmermann was named the Nationals' fifth starter during Spring Training with the understanding he would pitch with Triple-A Syracuse until his services were needed 11 games into Washington's schedule.
Zimmermann, 22, made one start with the Chiefs, tossing 5 1/3 innings on April 9 against Rochester. Zimmermann went 1-1 with a 3.14 ERA in five games (three starts) this spring, and he held opponents scoreless in four of his five outings.
"You are always excited to see one of your bright prospects," acting general manager Mike Rizzo said. "I feel he will come with a good game plan. I don't think he will be intimidated by a Major League stadium or Major League hitters. I'm looking forward to him having a successful outing and really kick-start his Major League career."
Zimmermann entered this season rated the Nationals' No. 1 prospect by Baseball America. After 39 Minor League games, he owns a 15-5 career record with a 2.81 ERA.
Zimmermann was the Nationals' 2008 Minor League Player of the Year, after going a combined 10-3 with a 2.89 ERA in 25 games with Class A Potomac and Double-A Harrisburg.Pitching matchup
WSH: RHP Jordan Zimmermann (Big league debut)
Zimmermann was selected by Washington in the second round of the 2007 First-Year Player's Draft with the second of two compensation picks awarded to the organization after Alfonso Soriano signed with the Cubs in November 2006. ATL: RHP Derek Lowe (1-0, 2.81 ERA)
Lowe struggled with his control while throwing 106 pitches and matching a career-high five walks in a five-inning effort against the Marlins on Tuesday night. His April 10 start against the Nationals was limited to three innings because of a lengthy rain delay. In his two starts against the Nationals last year, he worked 16 innings, surrendered seven hits and allowed just two earned runs. The 36-year-old sinkerballer began this season by allowing two hits in eight scoreless innings against the Phillies. Tidbits
Outfielder Adam Dunn had another solid game Sunday, going 2-for-2 to raise his batting average to .324. ... The Nationals have scored 14 runs in the first inning. ... Ryan Zimmerman is on a nine-game hitting streak. He is hitting .310 with two home runs and 10 RBIs during that stretch. Tickets
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WFED 1500, SBN 1390 (Español), ESPN 730 (Sp.) Up next
Tuesday: Nationals (Shairon Martis, 1-0, 4.82) vs. Braves (Kenshin Kawakami, 1-1, 5.25), 7:05 p.m. ET
Wednesday: Nationals (John Lannan, 0-2, 6.46) vs. Braves (Jair Jurrjens, 2-1, 2.04), 7:05 p.m. ET
Bill Ladson is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.