Still, Zimmermann will be looking for his first win since May 22 when he takes the mound for the Nationals on Wednesday night against the Rockies at Coors Field. Zimmermann is 0-1 with a 3.11 ERA in June.
Zimmermann (3-6, 2.89 ERA) pitched well enough to win in his last start at Baltimore, but the Nationals offense gave him only one run of support. Zimmermann allowed only two runs on eight hits in seven innings, but he admitted he didn't have his best stuff.
"The slider was terrible, it was just spinning," Zimmermann said after the game. "The fastball command wasn't that good, and it seemed like I had runners on every inning to lead off. I really had to battle."
Zimmermann figures to get better run support on Wednesday as the NL-East leading Nationals go against Colorado pitcher Edwar Cabrera, making his Major League debut. Struggling left-hander Josh Outman was originally scheduled to start, but Cabrera will take the mound instead. Manager Jim Tracy pushed Outman's start back to Thursday.
The left-handed Cabrera, who had been pitching at Double-A Tulsa, led the Minor Leagues with 174 strikeouts last season at Class A Modesto and was 8-4 with a 2.94 ERA in 15 starts for Tulsa. Cabrera earned an invitation to the Sirius XM Futures Game during All-Star Weekend, although he won't appear there if he's on the Rockies' roster.
"For me, it's the same game, here, Double-A, Single-A, everywhere," Cabrera said Tuesday.
Nationals: Rookie Moore continues to produce
Rookie outfielder Tyler Moore was in the lineup on Tuesday against a left-handed starting pitcher, and he didn't disappoint.
Moore went 2-for-5 with a home run and three RBIs in the Nationals' 9-4 win, and he is now hitting .319 with three homers and eight RBIs on the season. Moore is 3-for-8 in the series against the Rockies.
"His performance has not gone unnoticed by the managerial staff," Nationals manager Davey Johnson said Monday.
First baseman Adam LaRoche went 2-for-4 with two home runs Tuesday night, his first multi-home run game since Aug. 1, 2010.
Rockies: Pitching coach re-assigned
Rockies pitching coach Bob Apodaca was re-assigned at his own request on Tuesday. Bullpen coach Jim Wright and Triple-A Colorado Springs pitching coach Bo McLaughlin will serve as co-pitching coaches for the Rockies going forward.
Apodaca, 62, had been the Rockies pitching coach since 2003. He was named special assistant to general manager Dan O'Dowd, and will be responsible for special pitching assignments.
"I completely understand where he's at," said manager Jim Tracy. "I know what stress and fatigue can do to a man. In the long run, this may end up doing Bobby a world of good. I really, truly understand in my heart that he is emotionally, physically and mentally eaten up right now, and he deserves a break."
Second baseman Marco Scutaro missed Tuesday's game after being hit in the head by a Stephen Strasburg pitch on Monday. Scutaro participated in pregame activities and said he was feeling "fine."
Zimmermann is 2-0 with a 2.25 ERA in three career starts against the Rockies.
Rockies left fielder Carlos Gonzalez has hit in 13 of his last 14 games. He's hitting .373 (22-for-59) with three home runs and nine RBIs during that time.
Dexter Fowler's home run on Tuesday was his second in five games for the Rockies after going nearly a month without hitting one.